0001564590-22-010721 | 10-K | XBRL Viewer

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 148,989	$ 4,455
Accounts receivable		14,149
Prepaid expenses and other current assets	2,283	81
Total current assets	151,272	18,685
Property and equipment, net	57	21
Operating lease right-of-use assets	557	119
Intangible asset, net	3,811
Other assets	2,213
Total assets	157,910	18,825
Current liabilities:
Accounts payable	6,439	2,392
Accrued liabilities	8,445	4,099
Payable to related party	258	14,314
Convertible related party promissory notes payable at fair value		9,029
Operating lease liabilities, current portion	131	125
Other current liabilities		99
Total current liabilities	15,273	30,058
Convertible promissory notes payable at fair value		1,102
Payable to related party	5,757
Operating lease liabilities, net of current portion	474
Other liabilities		97
Total liabilities	21,504	31,257
Commitments and contingencies (Note 15)
Stockholders’ equity (deficit):
Common stock, $0.0001 par value, 300,000,000 and 20,000,000 shares authorized; 20,894,695 and 2,542,358 shares issued and outstanding as of December 31, 2021 and 2020, respectively	2	1
Additional paid-in capital	279,089	20,161
Accumulated deficit	(142,685)	(32,595)
Total stockholders’ equity (deficit)	136,406	(12,432)
Total liabilities and stockholders’ equity (deficit)	157,910	18,825
Series Seed Preferred Stock [Member]
Stockholders’ equity (deficit):
Preferred stock value
Series A Preferred Stock [Member]
Stockholders’ equity (deficit):
Preferred stock value		$ 1

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Preferred stock, par value	$ 0.0001
Preferred stock, shares authorized	10,000,000
Preferred stock, shares outstanding	0
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	300,000,000	20,000,000
Common stock, shares issued	20,894,695	2,542,358
Common stock, shares outstanding	20,894,695	2,542,358
Series Seed Preferred Stock [Member]
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	0	734,218
Preferred stock, shares issued	0	734,218
Preferred stock, shares outstanding	0	734,218
Preferred stock, aggregate liquidation preference	$ 0	$ 1,101
Series A Preferred Stock [Member]
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	0	7,211,948
Preferred stock, shares issued	0	7,211,948
Preferred stock, shares outstanding	0	7,211,948
Preferred stock, aggregate liquidation preference	$ 0	$ 28,433

Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Revenue	$ 1,120	$ 14,580
Operating expenses
Research and development (includes related party amounts of $200 and $2,461, respectively)	19,670	15,008
General and administrative	18,511	2,121
Impairment of acquired contract intangible asset	74,156
Total operating expenses	112,337	17,129
Loss from operations	(111,217)	(2,549)
Other income (expense)
Change in fair value of convertible promissory notes	1,585	(153)
Gain upon extinguishment of debt	196
Interest income	13	41
Interest expense (includes related party amounts of $600 and $734, respectively)	(665)	(815)
Total other income (expense), net	1,129	(927)
Loss before income tax expense	(110,088)	(3,476)
Income tax expense	(2)	(2)
Net and comprehensive loss	(110,090)	(3,478)
Cumulative dividends on convertible preferred stock	(647)	(987)
Net and comprehensive loss attributable to common stockholders	$ (110,737)	$ (4,465)
Net and comprehensive loss per share attributable to common stockholders, basic and diluted	$ (12.41)	$ (1.76)
Weighted average number of common shares outstanding used in computing net and comprehensive loss per share attributable to common stockholders, basic and diluted	8,923,369	2,542,358
License [Member]
Revenue	$ 1,000	$ 14,000
Grant [Member]
Revenue	$ 120	$ 580

Consolidated Statements of Operations and Comprehensive Loss (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Research and development, related party	$ 200	$ 2,461
Interest expense, related party	$ 600	$ 734

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Promissory Note [Member]	PIPE Investors [Member]	Former Stockholders/Executives of Aerpio Upon Merger [Member]	Preferred Stock [Member] Series Seed Preferred Stock [Member]	Preferred Stock [Member] Series A Preferred Stock [Member]	Common Stock	Common Stock Promissory Note [Member]	Common Stock PIPE Investors [Member]	Common Stock Former Stockholders/Executives of Aerpio Upon Merger [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] Promissory Note [Member]	Additional Paid-in Capital [Member] PIPE Investors [Member]	Additional Paid-in Capital [Member] Former Stockholders/Executives of Aerpio Upon Merger [Member]	Accumulated Deficit [Member]
Balance at Dec. 31, 2019	$ (9,093)					$ 1	$ 1				$ 20,022				$ (29,117)
Balance, Shares at Dec. 31, 2019					734,000	7,212,000	2,542,000
Share-based compensation expense	139										139
Net and comprehensive loss	(3,478)														(3,478)
Balance at Dec. 31, 2020	(12,432)					$ 1	$ 1				20,161				(32,595)
Balance, Shares at Dec. 31, 2020					734,000	7,212,000	2,542,000
Exercise of stock options to purchase common stock	$ 833										833
Exercise of stock options to purchase common stock, shares	72,316						73,000
Issuance of common stock			$ 145,384	$ 105,888					$ 1				$ 145,383	$ 105,888
Issuance of common stock, Shares									11,853,000	3,209,000
Conversion of convertible promissory note/preferred stock in to common stock upon merger	$ (1)	$ 9,130				$ (1)						$ 9,130
Conversion of convertible promissory note/preferred stock in to common stock upon merger, shares					(734,000)	(7,212,000)	2,520,000	698,000
Share-based compensation expense	2,106										2,106
Cumulative dividends paid on Series A preferred stock	(4,412)										(4,412)
Net and comprehensive loss	(110,090)														(110,090)
Balance at Dec. 31, 2021	$ 136,406						$ 2				$ 279,089				$ (142,685)
Balance, Shares at Dec. 31, 2021							20,895,000

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net and comprehensive loss	$ (110,090)	$ (3,478)
Adjustments to reconcile net loss to net cash used in operating activities:
Impairment of acquired contract intangible asset	74,156
Change in fair value of convertible promissory notes (includes related party amounts of $1,404 and $130, respectively)	(1,585)	153
Non-cash interest expense (includes related party amounts of $578 and $734, respectively)	665	815
Gain on forgiveness of Payroll Protection Plan loan	(196)
Share-based compensation expense	2,106	139
Non-cash lease expense	171	167
Depreciation and amortization expense	105	9
Changes in operating assets and liabilities:
Accounts receivable	14,149	(13,864)
Prepaid expenses and other current assets	(2,166)	(22)
Other non-current assets	481	37
Operating lease liability	(129)	(197)
Accounts payable and accrued liabilities	8,290	1,079
Payable to related party	(8,380)	2,461
Net cash used in operating activities	(22,423)	(12,701)
Investing activities:
Cash acquired in connection with the Merger	29,700
Transaction expenses related to the Merger	(4,501)
Purchase of property and equipment	(46)
Net cash provided by investing activities	25,153
Financing activities:
Proceeds from the exercise of stock options	833
Proceeds from the issuance of common stock to PIPE Investors	155,000
Costs incurred in connection with issuance of common stock	(9,617)
Dividends paid	(4,412)
Proceeds from issuance of convertible promissory notes		1,000
Proceeds from Payroll Protection Loan Program		194
Net cash provided by financing activities	141,804	1,194
Net increase (decrease) in cash and cash equivalents	144,534	(11,507)
Cash and cash equivalents at beginning of year	4,455	15,962
Cash and cash equivalents at end of year	148,989	$ 4,455
Supplemental disclosure of cash flow information:
Interest paid during the period	22
Supplemental disclosure of non-cash activities:
Issuance of common stock upon Merger	105,888
Operating lease liability arising from obtaining right-of-use asset	610
Conversion of convertible promissory note into common stock upon Merger	$ 9,130

Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Statement Of Cash Flows [Abstract]
Related party transaction amounts included in change fair value of convertible promissory notes	$ 1,404	$ 130
Related party costs included in non-cash interest expense	$ 578	$ 734

- Definition

Direct costs arising from transactions with related parties who are not affiliates or joint Ventures. These costs are categorized as cost of goods sold.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Section S99
-Paragraph 2
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
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-Section S99
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-Subparagraph (SX 210.13-01(a)(5))
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
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-Paragraph 1
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iv))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756

+ Details

Nature of Organization and Operations

12 Months Ended

Dec. 31, 2021

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Nature of Organization and Operations

1.	Nature of Organization and Operations

Aadi Bioscience, Inc. (together with its subsidiaries, the “Company” or “Aadi”) is a biopharmaceutical company focused on developing and commercializing precision therapies targeted to rare mutation-driven diseases. Aadi’s lead drug product, FYARRO (previously called ABI-009), is nab-sirolimus (sirolimus protein-bound particles for injectable suspension (albumin-bound)) for diseases driven by the mTOR pathway activation through mutations or deletions of specific genes such as Tuberous Sclerosis Complex 1 and 2 (“TSC1” and “TSC2”). FYARRO is licensed to Aadi by Abraxis BioScience, LLC, a wholly owned subsidiary of Celgene Corporation, now Bristol Myers Squibb Company (“Celgene”), for all therapeutic areas including oncology, cardiovascular, and metabolic related diseases.

The Company’s historical operations have consisted principally of performing research and development activities and raising capital. The Company’s activities are subject to significant risks and uncertainties, including failing to secure additional funding before sustainable revenues and profit from operations are achieved.

Merger with Aerpio Pharmaceuticals, Inc. and Name Change

On May 16, 2021, the Company, then operating as Aerpio, entered into the Agreement and Plan of Merger (“Merger Agreement”) with Aspen Merger Subsidiary, Inc., a Delaware corporation and a direct, wholly-owned subsidiary of Aerpio (“Merger Sub”) and Aadi Subsidiary, Inc. (formerly known as Aadi Bioscience, Inc. (“Private Aadi”)).

Pursuant to the terms set forth in the Merger Agreement and effective August 26, 2021 (the “Effective Time”): (i) Merger Sub merged with and into Private Aadi, with Private Aadi surviving as a wholly-owned subsidiary of Aerpio (the “Merger”), (ii) Aerpio changed its name to Aadi Bioscience, Inc. in connection with and immediately prior to the Effective Time of the Merger, and (iii) Aerpio effected a 15:1 reverse stock split of the Aerpio common stock (“Reverse Stock Split”) immediately prior to the Effective Time of the Merger. At the Effective Time, each share of Private Aadi common stock outstanding immediately prior to the Effective Time, including the shares of Private Aadi common stock issuable upon the conversion of all shares of preferred stock and convertible promissory notes immediately prior to the closing of the Merger, were converted into the right to receive shares of the Company’s common stock based on an exchange ratio of 0.3172 (the “Exchange Ratio”), after taking into account the Reverse Stock Split.

Pursuant to the Merger Agreement, Aerpio assumed all of the outstanding and unexercised options to purchase shares of Private Aadi capital stock under the Private Aadi Amended and Restated 2014 Equity Incentive Plan (the “Private Aadi Plan”), and, in connection with the Merger, such options were converted into options to purchase shares of the Company’s common stock based on the Exchange Ratio. At the closing of the Merger at the Effective Time, the Company issued an aggregate of 5,776,660 shares of common stock to holders of Private Aadi common stock, including for shares of Private Aadi common stock issuable upon the conversion of all shares of preferred stock and convertible promissory notes outstanding immediately prior to the Effective Time. In connection with the Merger, the Company entered into a Contingent Value Rights Agreement (the “CVR Agreement”) with a legacy director of Aerpio, as Holder Representative (as defined in the CVR Agreement), and American Stock Transfer & Trust Company, LLC, as Rights Agent (as defined in the CVR Agreement), in accordance with the terms of the Merger Agreement. The CVR Agreement entitles each holder of Aerpio common stock as of immediately prior to the closing of the Merger (each, a “CVR Holder”) to receive one contingent value right (“CVR”) for each outstanding share of Aerpio common stock held by such CVR Holder as of immediately prior to the closing of the Merger, each representing the right to receive certain net proceeds, if any, derived from the CVR completed during a CVR Payment Period, which means successive six-month periods, prior to the expiration of the CVR Term (as defined in the CVR Agreement), with any potential payment obligations continuing until the earlier of (a) the 20-year anniversary of the Effective Time and (b) the time at which the license agreement with Gossamer Bio, Inc., the underlying basis for the CVR, has expired or been terminated. Under the terms of the Merger Agreement, as related to the CVR, the Company is entitled to 10% of any proceeds paid from the underlying license agreement plus reimbursement of expenses. There can be no assurances that any proceeds will result therefrom.

The Merger has been accounted for using the reverse asset acquisition method under U.S. generally accepted accounting principles (“GAAP”). For accounting purposes, Private Aadi is considered to have acquired Aerpio and the Merger has been accounted for as a reverse asset acquisition. Private Aadi is considered the accounting acquirer even though Aerpio issued the common stock in the Merger based on the terms of the Merger Agreement and other factors including: (i) following the Merger, the stockholders of Private Aadi collectively owned a substantial portion

of the voting rights of the Company; (ii) three (3) of seven (7) members of the board of directors of the Company post-Merger were composed of directors designated by Private Aadi under the terms of the Merger Agreement, and one (1) member of the board of directors of the Company post-Merger was a director mutually designated by Private Aadi and Aerpio; (iii) existing members of Private Aadi’s management became the management of the Company post-Merger; (iv) the PIPE Investors (as defined below) consist of individuals and funds, and for purpose of this analysis, while they owned approximately 55.6% on a fully-diluted basis, as of immediately following the Merger (and after giving effect to the PIPE Financing), no one individual or fund held more shares than the holders of Private Aadi collectively owned immediately following the Merger and they are not considered to be a single voting group; and (v) following the Merger, the Company is named “Aadi Bioscience, Inc.” and headquartered in Pacific Palisades, California, and all ongoing operations of the Company are those of Private Aadi. To determine the accounting for this transaction under GAAP, a company must assess whether an integrated set of assets and activities should be accounted for as an acquisition of a business or an asset acquisition. Upon closing of the Merger, substantially all of the fair value is concentrated in cash, working capital and a long-lived contract intangible asset. As such, the acquisition was treated as an asset acquisition. The net assets of Aerpio have been recorded at their relative fair value in the consolidated financial statements of the Company and the reported operating results prior to the Merger will be those of Private Aadi.

Pursuant to the closing of the Merger, Private Aadi’s board of directors declared a 4% cumulative dividend on its preferred stock of $4.4 million which was paid at the Effective Time.

PIPE Financing and Subscription Agreement

On May 16, 2021, the Company entered into a subscription agreement (“Subscription Agreement”) with certain investors (the “PIPE Investors”), pursuant to which it would sell shares of its Common Stock concurrently with the closing of the Merger (the “PIPE Financing”). At the closing of the PIPE Financing, the Company entered into a Registration Rights Agreement, dated August 26, 2021 (“Registration Rights Agreement”), with the PIPE Investors. The PIPE Investors purchased an aggregate of 11,852,862 shares of common stock of the Company (the “PIPE Shares”) for an aggregate purchase price of $155.0 million pursuant to the Subscription Agreement (“PIPE Financing”). The aggregate net proceeds for the issuance and sale of the of the PIPE Shares was $145.4 million, after deducting certain expenses incurred that were direct and incremental to the issuance of the PIPE Shares.

Immediately following the Effective Time, and after giving effect to the Reverse Stock Split and the PIPE Financing, there were approximately 20.8 million shares of common stock of the Company outstanding. Immediately following the Effective Time and after giving effect to the Reverse Stock Split and the PIPE Financing: (i) the Private Aadi stockholders owned approximately 29.2% of the outstanding shares of common stock; (ii) Aerpio’s stockholders immediately prior to the Merger, whose shares of common stock, as adjusted for the Reverse Stock Split, remain outstanding after the Merger, owned approximately 15.2% of the outstanding shares of common stock; and (iii) the PIPE Investors owned approximately 55.6% of the outstanding shares of common stock, in each case as calculated on a fully-diluted basis.

Liquidity

Since inception, the Company has devoted substantially all of its resources to research and development activities, business planning, establishing and maintaining its intellectual property portfolio, hiring personnel, raising capital and providing general and administrative support for these operations and has not realized revenues from its planned principal operations.

The Company has experienced net losses since its inception and expects to continue to incur net losses into the foreseeable future. The Company had an accumulated deficit of $142.7 million as of December 31, 2021 and net loss of $110.1 million and $3.5 million for the years ended December 31, 2021 and 2020, respectively. To date, these operating losses have been funded primarily from outside sources of invested capital through the issuance of convertible promissory notes, grant funding, the sale of securities, and proceeds from license agreements.

During the year ended December 31, 2021, the Company raised capital through the PIPE Financing of $155.0 million which netted $145.4 million after financing expenses. Additionally, the Company assumed $29.7 million of cash from Aerpio in the Merger, which netted to $27.7 million after $2.0 million of compensation related expenses for former Aerpio executives related to the Merger. The Company had cash and cash equivalents of $149.0 million at December 31, 2021. Management believes that the Company’s current cash and cash equivalents, including the aggregate net proceeds from the PIPE Financing, will provide sufficient funds to enable the Company to meet its obligations for at least twelve months from the filing date of this report.

COVID-19

In December 2019, a strain of coronavirus was reported in Wuhan, China and began to spread globally, including to the United States and Europe, in the following months. The World Health Organization has declared COVID-19 to be a global pandemic. The full impact of the COVID-19 pandemic is inherently uncertain at the time of this report. The COVID-19 pandemic has resulted in travel restrictions and, in some cases, prohibitions of non-essential activities, disruption and shutdown of businesses, and greater uncertainty in global financial markets. As COVID-19 has spread, it has significantly impacted the health and economic environment around the world, and many governments have closed most public establishments, including restaurants, workplaces, and schools. Aadi’s clinical trials have been, and may continue to be, affected by the closure of offices, or country borders, among other measures being put in place around the world. The inability to travel and conduct face-to-face meetings, as well as constraints surrounding hospital resources, infrastructure, staff and other resources, can also make it more difficult to enroll new patients in ongoing or planned clinical trials. Any of these circumstances will potentially have a negative impact on the Company’s financial results and the timing of its clinical trials.

The COVID-19 pandemic has caused the Company to modify business practices (including but not limited to curtailing or modifying employee travel, moving to full remote work, and cancelling physical participation in meetings, events, and conferences), and may take further actions as may be required by government authorities or that are determined to be in the best interests of the Company’s employees, patients, and business partners.

The extent of the impact of the COVID-19 pandemic on Aadi’s future liquidity and operational performance will depend on certain developments, including the duration and spread of the outbreak, the availability and effectiveness of vaccines, the impact on the Company’s clinical trials, patients, and collaboration partners, and the effect on its suppliers.

Related Party Transactions

12 Months Ended

Dec. 31, 2021

Related Party Transactions

2. Related Party Transactions

Presented below are the details of a license agreement with Celgene, an entity which was a stockholder of Private Aadi prior to the Merger and became a stockholder of the Company as a result of the Merger.

Celgene License Agreement

On April 9, 2014, the Company entered into a license agreement (the “Celgene License Agreement”) with Celgene for exclusive rights for certain patents and a non-exclusive license for certain technology and know-how pertaining to FYARRO.

The Celgene License Agreement will remain in effect from the effective date of April 9, 2014 until expiration of all milestone and royalty payment obligations under the agreement, unless terminated by either of the parties upon giving an advance notice as specified in the Celgene License Agreement. Under the terms of the Celgene License Agreement, Celgene agreed to supply the Company with licensed products of FYARRO necessary for clinical or non-clinical development.

Celgene had the option to terminate the Celgene License Agreement and all of the Company’s related rights and licenses upon the occurrence of each of the following: (a) successful completion of the first Phase 2 Trial for a licensed product (“First Trigger Event”), or (b) if Celgene elects not to exercise its option upon the First Trigger Event, then upon the acceptance by the Food and Drug Administration or the European Medicines Agency, as applicable, of the first New Drug Application either in the United States or European Union, whichever occurs first, for a licensed product (“Second Trigger Event”). On May 1, 2019, Celgene terminated its rights to elect an option to terminate the Celgene License Agreement upon the occurrence of a First Trigger Event, Second Trigger Event or Early Exercise. As a result, the Company is free to negotiate and enter into any agreement with respect to an acquisition of all or substantially all of the business or assets of the Company whether by merger, sale of equity or assets, or otherwise and to consummate the same as it sees fit.

Celgene is entitled to receive certain development milestone payments, royalties on net sales from licensed products under the agreement and any sublicense fees. No payments related to milestones or royalties under this agreement were paid during the years ended December 31, 2021 and December 31, 2020. See below for discussion on sub-license fee.

On November 15, 2019, Celgene and the Company entered into an amendment to the Celgene License Agreement (the “Amended Celgene License Agreement”) to terminate certain of Celgene’s FYARRO product supply obligations and to transfer control over certain regulatory filings under the original Celgene License Agreement

from Celgene to the Company. The Amended Celgene License Agreement also waived the obligations related to certain development milestone payments and waived the liability related to 2016 and 2017 licensed drug manufacturing costs of $1.2 million and $2.7 million, respectively.

On August 30, 2021, the Company and Celgene entered into Amendment No. 1 (the “Amendment”) to the Amended Celgene License Agreement related to certain intellectual property rights of Celgene pertaining to the compound known as FYARRO. Under the terms of the Amendment, the Company paid Celgene $5.8 million representing 50% of the previously outstanding payment obligation under the terms of the Amended Celgene License Agreement, following the Effective Time of the PIPE Financing. Pursuant to the terms of the Amendment, the remaining previously outstanding payment obligation of $5.8 million, is due on the third anniversary of the Effective Time, or August 26, 2024 plus any accrued and unpaid interest due thereon (“Balloon Payment”). The Balloon Payment shall accrue interest, beginning August 26, 2021 until paid in full, at a rate equal to 4.0% per annum based on the weighted average amount outstanding during the applicable calendar quarter, and interest is payable quarterly in arrears. In addition, the parties agreed to amend the royalty rates payable to Celgene based on net sales of products subject to the Amended Celgene License Agreement.

On December 8, 2020, the Company entered into a license agreement (“EOC License Agreement”) with EOC Pharma (Hong Kong) Limited (“EOC”) under which the Company received $14.0 million in January 2021 in non-refundable upfront consideration as partial payment for the rights and licenses granted to EOC by the Company for the further development and commercialization of FYARRO in the People’s Republic of China, Hong Kong Special Administration Region, Macao Special Administrative Region and Taiwan (the “Licensed Territory”). In accordance with the Celgene License Agreement, the Company is required to pay 20% of all sublicense fees to Celgene. As such, the Company recognized $2.8 million of license expense in the year ended December 31, 2020 and had a corresponding $2.8 million sublicense payable to Celgene on the balance sheet as of December 31, 2020, which was paid in 2021.

During the year ended December 31, 2021, the Company recognized license revenue and received $1.0 million from EOC for achieving the FDA approval milestone on November 22, 2021. In accordance with the Celgene License Agreement, the Company recognized $0.2 million of license expense in the year ended December 31, 2021 and had a corresponding $0.2 million sublicense payable to Celgene on the balance sheet as of December 31, 2021, which was paid in 2022. Refer to Note 8 for additional information on the EOC License Agreement.

Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2021

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

3. Summary of Significant Accounting Policies

Basis of Presentation

The consolidated financial statements, and the related disclosures, have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) and U.S. Securities and Exchange Commission (“SEC”) regulations and, in the opinion of management include all adjustments necessary for a fair presentation of the results of operations, financial position, changes in stockholders’ equity and cash flows for each period presented. Any reference in these notes to applicable guidance is meant to refer to the authoritative GAAP as found in the Accounting Standards Codification (“ASC”) and Accounting Standards Updates (“ASU”) of the Financial Accounting Standards Board (“FASB”). All adjustments are of a normal and recurring in nature. The Company’s consolidated financial statements are stated in U.S. Dollars.

On August 26, 2021, when the Company closed the Merger, all outstanding shares of common stock along with preferred stock of Private Aadi were exchanged for new shares of common stock of the Company and the approximately 8.1 million shares of Private Aadi capital stock held by stockholders of Private Aadi immediately prior to the Merger were exchanged for approximately 2.5 million shares of common stock of the Company based on the Exchange Ratio. The authorized number of shares of common stock was not reduced and remains at 300.0 million. The par value of the Company’s common stock remains unchanged at $0.0001 per share.

Also on August 26, 2021, and immediately prior to the closing of the Merger, Aerpio effected the Reverse Stock Split. Accordingly, all share and per share amounts for the period presented in the accompanying consolidated financial statements and notes thereto have been adjusted retroactively, where applicable, to reflect the Reverse Stock Split. No fractional shares were issued in connection with the Reverse Stock Split. Unless otherwise noted, all references to shares of the Company’s common stock and per share amounts have also been adjusted to reflect the Exchange Ratio.

Segment Information

Operating segments are defined as components of an enterprise about which separate discrete information is available for evaluation by the chief operating decision maker, or decision-making group, in deciding how to allocate resources and in assessing performance. The Company views its operations and manages its business in one operating segment, which is the business of developing and commercializing proprietary therapeutics. All the assets and operations of the Company’s sole operating segment are located in the United States.

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that impact the reported amounts of assets, liabilities, revenues and expenses, and the disclosure of contingent assets and liabilities in the Company’s consolidated financial statements and accompanying notes. In the opinion of management, all adjustments, consisting of normal recurring accruals, considered necessary for a fair presentation have been included. The most significant estimates in the Company’s consolidated financial statements relate to fair value of the intangible asset, fair value of the convertible promissory notes, stock-based compensation expense and accrued research and development costs. Although these estimates are based on the Company’s knowledge of current events and actions it may undertake in the future, actual results may materially differ from these estimates and assumptions.

Concentration of Credit Risk

Financial instruments, which potentially subject the Company to concentration of credit risk, consist primarily of cash and cash equivalents and certain investments in money market funds. The Company maintains deposits in federally insured financial institutions in excess of federally insured limits. Management believes that the Company is not exposed to significant credit risk due to the financial position of the depository institutions in which those deposits are held. The Company has not experienced any losses on deposits since inception.

Cash and Cash Equivalents

The Company considers all highly liquid marketable securities purchased with original maturities of three months or less at the time of purchase date to be cash equivalents. At December 31, 2021 and 2020, cash and cash equivalents included money market investments totaling $140.0 million and $3.0 million, respectively.

Fair Value Option

The Company has elected the fair value option to account for its convertible promissory notes issued. The Company records these convertible promissory notes at fair value with changes in fair value recorded in the statements of operations and comprehensive loss. As a result of applying the fair value option, direct costs and fees related to the convertible promissory notes were recognized in earnings as incurred and not deferred. As of December 31, 2021, there were no Convertible Notes outstanding as they were converted to shares of Private Aadi common stock immediately prior to the closing of the Merger.

Fair Value of Financial Instruments

The accounting guidance defines fair value, establishes a consistent framework for measuring fair value, and expands disclosure for each major asset and liability category measured at fair value on either a recurring or nonrecurring basis. Fair value is defined as an exit price representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. As a basis for considering such assumptions, the accounting guidance establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value as follows:

Level 1: Observable inputs, such as quoted prices in active markets

Level 2: Inputs, other than the quoted prices in active markets that are observable either directly or indirectly

Level 3: Unobservable inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions which reflect those that a market participant would use. The valuation of the Level 3 intangible asset was based on fair value measurements including discounted cash flow methodologies when valued at the time of the Merger.

Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. The Company’s assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy levels.

In determining the fair value of its financial instruments, the Company considers the source of observable market data inputs, liquidity of the instrument, the credit risk of the counterparty to the contract, and its risk of nonperformance. In the case fair value is not observable, for the items subject to fair value measurements, the Company applies valuation techniques deemed the most appropriate under the GAAP guidance based on the nature of the assets and liabilities being measured.

The carrying amounts of cash and cash equivalents, accounts receivable, prepaid expenses and other current assets and accounts payable are reasonable estimates of their fair value because of the short maturity of these items.

The following table sets forth the recurring and non-recurring fair value of the Company’s financial assets and liabilities, allocated into the Level 1, Level 2 and Level 3 hierarchy that were measured at fair value on a recurring basis (amounts in thousands):

Recurring fair value measurements:

	Fair Value Measurements as of December 31, 2021
	Level 1		Level 2		Level 3		Total
Assets:
Money market funds (1)	$	140,032	$	—	$	—	$	140,032

	Fair Value Measurements as of December 31, 2020
	Level 1		Level 2		Level 3		Total
Assets:
Money market funds (1)	$	3,041	$	—	$	—	$	3,041
Liabilities:
Convertible promissory notes	$	—	$	—	$	10,131	$	10,131

(1)

Included in cash and cash equivalents in the accompanying balance sheets.

Non-Recurring fair value measurement:

	Fair Value Measurements as of December 31, 2021
	Level 1		Level 2		Level 3		Total
Assets:
Intangible asset	$	-	$	-	$	3,811	$	3,811

Intangible Asset

The Company recognized an impairment of the contract intangible asset acquired in connection with the Merger and reduced the contract intangible asset to its estimated fair value which represented a Level 3 fair value measurement as factors used to develop the estimated fair value are unobservable inputs that are not supported by market activity. The total contract intangible asset was valued at $3.9 million utilizing a scenario-based, risk-adjusted, discounted cash flow model with respect to the potential development milestone payments within the underlying license agreement and a Monte Carlo option-pricing model with respect to the sales-based milestone and royalty payments:

•

The Company determined fair value of the potential development milestone payments under the license agreement with inputs based on certain subjective assumptions, including (a) the probability of clinical success determined with reference to various academic studies reporting probabilities of approval for clinical trials; (b) an estimate of the time to achievement of the clinical milestones; and (c) a counterparty credit risk premium determined with reference to the borrowing costs of a benchmark group of comparable market participants.

•

Application of the Monte Carlo simulation model in valuing the potential sales-based milestone and royalties involves making assumptions for (a) the probability of clinical success determined with reference to various academic studies reporting probabilities of approval for clinical trials; (b) a forecast of potential revenues, revenue uptake rate and the period of time from a prospective commercial launch to peak sales, and an estimate of peak sales for each successfully commercialized product covered under the license agreement; (c) drift equal to the risk free rate on revenues following a multivariate Geometric Brownian Motion; (d) a counterparty credit risk premium determined with reference to the borrowing costs of a benchmark group of comparable market participants; and (e) a revenue metric risk premium determined with reference to a long-term risk-free rate, a weighted-average cost of capital, revenue volatility and asset volatility

See Notes 4 and 5 for further discussion of the Intangible Asset acquired through the Merger.

Convertible Note

As further described in Note 9, Private Aadi issued convertible notes in October 2019 and January 2020 (collectively the “Convertible Notes”). The Company elected the fair value option to account for the Convertible Notes. The fair value was estimated using a scenario-based analysis based on the probability-weighted value of expected future investment returns, considering possible outcomes available to the noteholders including conversions in subsequent equity financings, change of control transactions, settlement, and dissolution. The Company adjusts the carrying value of its Convertible Notes to their estimated fair value at each reporting date, with any related increases or decreases in the fair value recorded as a change in fair value of convertible promissory notes in the statements of operations and comprehensive loss.

As of December 31, 2021, there were no Convertible Notes outstanding as the Convertible Notes were converted to shares of Private Aadi common stock immediately prior to the closing of the Merger, which were concurrently exchanged for common stock of the Company based on the Exchange Ratio in connection with the closing of the Merger. As of December 31, 2020, the significant unobservable inputs used in the fair value measurement of the Convertible Notes included an expected settlement date in August 2021 and June 2021, respectively, and an estimated discount rate of 25%. Other significant unobservable inputs include the relative weighting applied to the possible outcomes available to the noteholders including conversions in subsequent equity financings, change of control transactions, settlement, and dissolution.

There are significant judgments, assumptions and estimates inherent in the determination of the fair value of the Convertible Notes described above. These include determination of a valuation method and selection of the possible outcomes available to the Company, including the determination of timing and expected future investment returns for such scenarios, as well as the likelihood of repayment, conversion, and dissolution. The related judgments, assumptions and estimates are highly interrelated and changes in any one assumption could necessitate changes in another. Any changes in the probability of a particular outcome would require a related change to the probability of another outcome.

The following table provides a reconciliation of the Convertible Notes (refer to Note 9) measured at fair value using significant unobservable inputs (Level 3) (amounts in thousands):

	Convertible Notes
	(Level 3)
Balance as of December 31, 2019	$	8,165
Issuance of convertible promissory notes		1,000
Accrued interest		813
Change in fair value of convertible promissory notes		153
Balance as of December 31, 2020	$	10,131
Issuance of convertible promissory notes		-
Accrued interest		584
Change in fair value of convertible promissory notes		(1,585	)
Converted into common stock		(9,130	)
Balance as of December 31, 2021	$	—

There have been no transfers between levels during the reporting periods.

Accounts Receivable

Accounts receivable represents revenue recognized, but for which payment has not yet been received. Accounts receivable at December 31, 2020 includes $14.0 million receivable related to the EOC upfront payment and $0.1 million grant revenue. These amounts were subsequently collected in 2021. Estimates for allowances for doubtful accounts are determined based on existing contractual obligations and historical payment patterns. No allowance for doubtful accounts was recorded as of December 31, 2021 and 2020.

Inventory

The Company capitalizes inventory costs associated with its products upon regulatory approval when, based on management’s judgment, future commercialization is considered probable and the future economic benefit is expected to be realized; otherwise, such costs are expensed. Prior to FDA approval of FYARRO, all costs related to the manufacturing of FYARRO were charged to research and development expense in the period incurred.

Property and Equipment, Net

Property and equipment, consisting of computers, furniture and fixtures, and office equipment, are stated at cost, less accumulated depreciation. Property and equipment is depreciated using the straight-line method over the estimated useful lives of the assets, generally five years. Such costs are periodically reviewed for recoverability when impairment indicators are present.

Intangible Asset

The Company’s intangible asset consists of a single asset, Aerpio’s license agreement with Gossamer Bio., Inc. acquired in the Merger. The intangible asset is stated at fair value and is amortized using the straight-line method over its estimated useful life of 14.3 years. The intangible asset is reviewed for potential impairment when events or circumstances indicate that carrying amounts may not be recoverable.

Impairment of Long-Lived Assets

The Company reviews long-lived assets, including property, equipment, and the intangible asset for impairment whenever events or changes in circumstances indicate that the carrying amount of the assets may not be recoverable. An impairment loss would be recognized when estimated undiscounted future cash flows expected to result from the use of the asset and its eventual disposition are less than the carrying amount. The impairment loss, if recognized, would be based on the excess of the carrying value of the impaired asset over its respective fair value. An impairment was recorded for the long-lived intangible asset during the year ended December 31, 2021 (see Note 5).

Leases

At the inception of a contractual arrangement, the Company determines whether the contract contains a lease by assessing whether there is an identified asset and whether the contract conveys the right to control the use of the identified asset in exchange for consideration over a period of time. If both criteria are met, the Company records the associated lease liability and corresponding right-of-use asset upon commencement of the lease using the implicit rate or a discount rate based on a credit-adjusted secured borrowing rate commensurate with the term of the lease. The Company does not recognize assets or liabilities for leases with lease terms of less than 12 months.

The Company additionally evaluates leases at their inception to determine if they are to be accounted for as an operating lease or a finance lease. A lease is accounted for as a finance lease if it meets one of the following five criteria: (i) the lease has a purchase option that is reasonably certain of being exercised, (ii) the present value of the future cash flows is substantially all of the fair market value of the underlying asset, (iii) the lease term is for a significant portion of the remaining economic life of the underlying asset, (iv) the title to the underlying asset transfers at the end of the lease term, or (v) if the underlying asset is of such a specialized nature that it is expected to have no alternative uses to the lessor at the end of the term. Leases that do not meet the finance lease criteria are accounted for as an operating lease. Operating lease assets represent a right to use an underlying asset for the lease term and operating lease liabilities represent an obligation to make lease payments arising from the lease. Operating lease liabilities with a term greater than one year and their corresponding right-of-use assets are recognized on the balance sheet at the commencement date of the lease based on the present value of lease payments over the expected lease term.

Certain adjustments to the right-of-use asset may be required for items such as initial direct costs paid or incentives received. As the Company’s leases do not typically provide an implicit rate, the Company utilizes the appropriate incremental borrowing rate, determined as the rate of interest that the Company would have to pay to borrow on a collateralized basis over a similar term and in a similar economic environment. For finance leases, depreciation expense is recognized for the leased asset acquired and interest expense is recognized related to the portion of the financing in the statements of operations. For operating leases, lease cost is recognized on a straight-line basis over the lease term and variable lease payments are recognized as operating expense in the period in which the obligation for those payments is incurred. Variable lease payments primarily include common area maintenance, utilities, real estate taxes, insurance, and other operating costs that are passed on from the lessor in proportion to the space leased by the Company. The Company has elected the practical expedient to not separate between lease and non-lease components.

Commitments and Contingencies

The Company recognizes a liability with regard to loss contingencies when it believes it is probable a liability has been incurred, and the amount can be reasonably estimated. If some amount within a range of loss appears at the time to be a better estimate than any other amount within the range, the Company accrues that amount. When no amount within the range is a better estimate than any other amount the Company accrues the minimum amount in the range. The Company has not recorded any such liabilities as of December 31, 2021 and 2020.

Revenue Recognition

Grant Revenue

The Company’s grant revenues are derived from federal grants with the U.S. Food and Drug Administration. The Company has determined that the government agencies providing grants to the Company are not customers. Grant revenue is recognized when there is reasonable assurance of compliance with the conditions of the grant and reasonable assurance that the grant revenue will be received. The Company recognizes grant revenues as reimbursable grant costs are incurred. The costs associated with these reimbursements are reflected as a component of research and development expense in the accompanying statements of operations and comprehensive loss.

With respect to grant revenue derived from reimbursement of direct out-of-pocket expenses for research costs associated with federal contracts, where the Company acts as principal with discretion to choose suppliers, bears credit risk, and performs part of the services required in the transaction, the Company records revenue for the gross amount of the reimbursement. The costs associated with these reimbursements are reflected as a component of research and development expense in the accompanying statements of operations and comprehensive loss.

Revenue Under License Agreement

The Company generates revenues from payments received under a license agreement. Under such license agreement, the Company recognizes revenue when it transfers promised goods or services to partners in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those goods or services. To determine revenue recognition for contracts with partners, the Company performs the following five steps: (i) identifies the promised goods or services in the contract; (ii) identifies the performance obligations in the contract, including whether they are distinct in the context of the contract; (iii) determines the transaction price, including the constraint on variable consideration; (iv) allocates the transaction price to the performance obligations in the contract; and (v) recognizes revenue when (or as) the Company satisfies the performance obligations.

For revenue from such license agreement, the Company generally collects an upfront license payment from the license partner and is also entitled to receive event-based payments subject to the license partner’s achievement of specified development, regulatory and sales-based milestones. In addition, the Company is generally entitled to royalties if products under the license agreement are commercialized.

Transaction price for a contract represents the amount to which the Company is entitled in exchange for providing goods and services to the partner. Transaction price does not include amounts subject to uncertainties unless it is probable that there will be no significant reversal of revenue when the uncertainty is resolved. Apart from the upfront license payment, all other fees the Company may earn under such license agreements are subject to significant uncertainties of product development. Achievement of many of the event-based development and regulatory milestones may not be probable until such milestones are actually achieved. This generally relates to milestones such as obtaining regulatory approvals and successful completion of clinical trials. With respect to other development milestones, e.g., dosing of a first patient in a clinical trial, achievement could be considered probable

prior to its actual occurrence, based on the progress towards commencement of the trial. The Company does not include any amounts subject to uncertainties into the transaction price until it is probable that the amount will not result in a significant reversal of revenue in the future. At the end of each reporting period, the Company re-evaluates the probability of achievement of such milestones and any related constraint, and if necessary, adjusts the estimate of the overall transaction price.

Because such agreements generally only have one type of performance obligation, a license, which is generally all transferred at the same time as agreement inception, allocation of the transaction price among multiple performance obligations is not required. Upfront amounts allocated to licenses are recognized as revenue when the licenses are transferred to the partners. Development milestones and other fees are recognized in revenue when their occurrence becomes probable.

Research and Development

Research and development expenses consist of costs incurred in performing research and development activities, including salaries and benefits, materials and supplies, preclinical expenses, stock-based compensation expense, contract services, and other external development expenses. The Company records research and development activities conducted by third-party service providers, which include work related to preclinical studies, clinical trials, and contract manufacturing activities, to research and development expense as incurred. The Company is required to estimate the amount of services provided but not yet invoiced and include these expenses in accrued expenses on the balance sheet and within research and development expenses in the statements of operations and comprehensive loss. These expenses are a significant component of the Company’s research and development expenses and require significant estimates and judgments. The Company accrues for these expenses based on factors such as estimates of the work completed and in accordance with agreements established with its third-party service providers. As actual expenses become known, the Company adjusts its accrued expenses.

Share-Based Compensation

The Company recognizes all stock-based payments to employees, including grants of employee stock options in the consolidated statements of operations and comprehensive loss based on their fair values. All the Company’s share-based awards, to employees, non-employees, officers, and directors, are subject only to service-based vesting conditions. The Company estimates the fair value of its stock-based awards using the Black-Scholes option pricing model, which requires the input of assumptions, including (i) the expected stock price volatility, (ii) the calculation of expected term of the award, (iii) the risk-free interest rate and (iv) expected dividends. Options granted during the year have a maximum contractual term of ten years. Forfeitures are recognized and accounted for as they occur.

Due to the historical lack of a public market for the trading of the Company’s securities and a lack of company-specific historical and implied volatility data, the Company has based its estimate of expected volatility on the historical volatility of a group of similar companies that are publicly traded. The computation of expected volatility is based on the historical volatility of a representative group of companies with similar characteristics to the Company, including stage of product development and life science industry focus. The Company believes the group selected has sufficient similar economic and industry characteristics and includes companies that are most representative of the Company.

The Company has limited historical stock option activity and therefore estimates the expected term of stock options granted to employees, officers, and directors using the simplified method, which represents the average of the contractual term of the stock option and its weighted-average vesting period, to calculate the expected term, as it does not have sufficient historical exercise data to provide a reasonable basis upon which to estimate the expected term for options granted to employees, and utilizes the contractual term for options granted to non-employees. The expected term is applied to the stock option grant group as a whole, as the Company does not expect substantially different exercise or post-vesting termination behavior among its employee population. The risk-free interest rate is based on the U.S. Treasury yield in effect at the time of the grant for zero-coupon U.S. treasury notes with maturities approximately equal to the expected term of the stock options. Compensation expense related to awards to employees is calculated on a straight-line basis by recognizing the grant date fair value over the associated service period of the award, which is generally the vesting term.

Income Taxes

Income taxes have been accounted for using the asset and liability method. Under the asset and liability method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates applicable to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. A valuation allowance against deferred tax assets is recorded if, based upon the weight of all available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized.

When uncertain tax positions exist, the Company recognizes the tax benefit of tax positions to the extent that the benefit will more likely than not be realized. The determination as to whether the tax benefit will more likely than not be realized is based upon the technical merits of the tax position, as well as consideration of the available facts and circumstances. The Company recognizes interest and penalties related to uncertain tax positions, if any exist, in income tax expense.

Net and Comprehensive Loss per Share Attributable to Common Stockholders

Basic net loss per share is calculated by dividing the net loss attributable to common stockholders by the weighted-average number of common shares outstanding for the period. Diluted net loss per share is computed by dividing the net loss attributable to common stockholders by the weighted average number of common shares and common share equivalents outstanding for the period. Common stock equivalents are only included when their effect is dilutive. The Company’s potentially dilutive securities, which include convertible promissory notes, convertible preferred stock, outstanding stock options and warrants under the Company’s equity incentive plans have been excluded from the computation of diluted net loss per share as they would be anti-dilutive.

Net loss per share is presented as the more dilutive of the treasury stock and as-converted method or the two-class method required for participating securities. The Series A convertible preferred stock is considered a participating security and does not have a contractual obligation to share in Private Aadi’s losses. As such, the two-class method was not required.

The following table sets forth the outstanding potentially dilutive securities that have been excluded in the calculation of diluted net loss per share because their inclusion would be anti-dilutive (amounts in thousands):

	Year Ended December 31,
	2021		2020
Options to purchase common stock		1,750		391
Warrants to purchase common stock		37		—
Series Seed convertible preferred stock		—		734
Series A convertible preferred stock		—		7,212

The table above excludes the conversion of the principal balance and accrued interest on the convertible promissory notes which converted into 698,018 shares of common stock in conjunction with the closing of the Merger.

Accounting Pronouncements Not Yet Adopted

In August 2020, the FASB issued ASU 2020-06, “Debt – Debt with Conversion and Other Options” (Subtopic 470-20) and “Derivatives and Hedging – Contracts in Entity’s Own Equity” (Subtopic 815-40). This new guidance is intended to reduce the complexity of accounting for convertible instruments. The guidance also addresses how convertible instruments are accounted for in the diluted earnings per share calculation and requires enhanced disclosures about the terms of convertible instruments. Entities may adopt ASU 2020-06 using either a partial retrospective or fully retrospective method of transition. This ASU is effective for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years for smaller reporting companies. The Company is currently evaluating the impact the adoption of ASU 2020-06 will have on the Company’s consolidated financial statements.

In April 2021, the FASB issued ASU 2021-04, which included Topic 260 “Earnings Per Share.” This guidance clarifies and reduces diversity in an issuer’s accounting for modifications or exchanges of freestanding equity-classified written call options due to a lack of explicit guidance in the FASB Codification. ASU 2021-04 is effective

for all entities for fiscal years beginning after December 15, 2021. Early adoption is permitted. The Company has evaluated the impact of adopting ASU 2021-04 and does not expect this will have a material impact on the Company’s consolidated financial statements.

Merger

12 Months Ended

Dec. 31, 2021

Business Combinations [Abstract]

Merger

4. Merger

The Merger was accounted for as a reverse asset acquisition because substantially all of the fair value was concentrated in cash, working capital, and a long-lived contract intangible asset (See Note 1).

The estimated fair value of total consideration given was $110.4 million as detailed below and is based on 3,208,718 shares of common stock, after taking into account the Reverse Stock Split, outstanding immediately prior to the Effective Time.

Number of common shares of the combined company to be owned by Aerpio shareholders		3,208,718
Multiplied by the fair value per share of Aerpio common stock on August 26, 2021	$	33.00
Fair value of Aerpio common stock		105,887,694
Aadi transaction costs		4,500,864
Purchase price	$	110,388,558

The allocation of the purchase price is as follows (amounts in thousands):

	August 26, 2021
Cash and cash equivalents	$	29,700
Other current assets		2,709
Intangible asset (1)		78,062
Deposits		20
Accounts payable and accrued liabilities		(103	)
Purchase price	$	110,388

(1)

The long-lived intangible asset represents Aerpio’s out-licensing agreement with Gossamer Bio., Inc. Should payment be received from the underlying license agreement, in accordance with milestones or royalties, the Company will retain 10% of the proceeds with the balance being distributed to the CVR Holders. In accordance with GAAP for asset acquisitions, the excess purchase price over the fair value of the acquired assets and liabilities was ascribed to the acquired contract intangible asset. See Note 5 below for additional discussion of the subsequent impairment recognized.

Intangible Asset

12 Months Ended

Dec. 31, 2021

Goodwill And Intangible Assets Disclosure [Abstract]

Intangible Asset

5. Intangible Asset

In conjunction with the Merger, the Company recorded a long-lived contract intangible asset related to Aerpio’s license agreement with Gossamer Bio. Inc., which was assumed in the Merger. In accordance with GAAP, for asset acquisitions, the excess purchase price over the fair value of the acquired assets and liabilities was ascribed to the acquired contract intangible asset. Due to the significant excess purchase price being allocated over the fair value of the acquired contract intangible asset, the Company determined that an indicator of impairment was present. The contract intangible asset was assessed for recoverability using an undiscounted cash flow model, which resulted in undiscounted cash flows below the carrying amount. The Company therefore recognized an impairment of $74.2 million to bring the carrying amount of the contract intangible asset down to its estimated fair value of $3.9 million. The fair value estimate of the intangible asset relates to contingent cash flows expected from Aerpio’s out-licensing arrangement, of which 90% of any future net cash proceeds will be remitted to CVR Holders and paid through the CVRs. The fair value determination of the intangible asset was based upon a discounted cash flow valuation of the milestone payments and Monte Carlo valuation for the sales royalties. The estimated useful life of the intangible asset is 14.3 years. Amortization expense was $95,000 for the year ended December 31, 2021. No intangible asset or amortization expense was recorded in 2020.

The estimated amortization expense related to this finite lived intangible asset for the five succeeding years is as follows (amounts in thousands):

	December 31,
	2021
Intangible asset	$	3,906
Less amortization		(95	)
Intangible asset, net	$	3,811

2022	$	273
2023		273
2024		273
2025		273
2026		273
Amounts thereafter		2,446
	$	3,811

As of December 31, 2021, all development milestones, sales-based milestones and royalty payments within the license agreement are constrained. There can be no assurance that any proceeds will be received under the license agreement.

Accrued Liabilities

12 Months Ended

Dec. 31, 2021

Accrued Liabilities Current [Abstract]

Accrued Liabilities

6. Accrued Liabilities

Details of accrued liabilities are presented as follows (amounts in thousands):

	December 31,
	2021		2020
Accrued clinical	$	2,507	$	2,017
Accrued contract manufacturing		2,287		1,301
Accrued bonus		1,465		597
Accrued professional fees		1,948		11
Accrued other		238		173
Total accrued liabilities	$	8,445	$	4,099

Operating Lease

12 Months Ended

Dec. 31, 2021

Leases [Abstract]

Operating Lease

7. Operating Lease

In April 2019, the Company entered into a twenty-eight-month facility lease agreement for 2,760 square feet of office space in Pacific Palisades, California. The lease commenced on May 1, 2019, included four months of rent abatement and a rent escalation clause and was set to expire on August 31, 2021. In August 2021, the Company exercised its option to extend the term of the lease for an additional three-year period and entered into an amendment to the lease agreement (the “Lease Amendment”). Pursuant to the Lease Amendment, the Company and the landlord agreed to extend the term for an additional period of three (3) years and six (6) months, until February 28, 2025, with an option to renew for an additional three (3) years in accordance with the terms of the lease agreement. Included in the Lease Amendment were nine months of rent abatement and a rent escalation clause. Rent expense is being recorded on a straight-line basis.

The following table summarizes information related to the Company’s lease (amounts in thousands):

	December 31,
	2021		2020
Assets:
Operating lease right-of-use assets	$	557	$	119
Total right-of-use assets	$	557	$	119

Liabilities:
Operating lease liabilities, current	$	131	$	125
Operating lease liabilities, non-current		474		—
Total operating lease liabilities	$	605	$	125

Rent expense related to this lease each of the twelve months ended December 31, 2021 and December 31, 2020 is presented on the following table (amounts in thousands):

	December 31,
	2021		2020
Cash paid included in operating cash flows	$	146	$	195
Operating leases rent expense	$	188	$	183

The future minimum lease payments required under the operating lease as of December 31, 2021, are summarized below (amounts in thousands):

Future Minimum Lease Payments:
2022	$	169
2023		231
2024		238
2025		40
Total minimum lease payments	$	678
Less: amount representing interest		(73	)
Present value of operating lease liabilities	$	605
Less: operating lease liabilities, current		(131	)
Operating lease liabilities, non-current	$	474
Remaining lease term (in years)	3.17
Incremental borrowing rate		6.80	%

EOC License Agreement

12 Months Ended

Dec. 31, 2021

Revenue From Contract With Customer [Abstract]

EOC License Agreement

8. EOC License Agreement

In December 2020, the Company entered into the EOC License Agreement with EOC for the further development of ABI-009, now called FYARRO, and commercialization of FYARRO in Greater China, including the Republic of China, Hong Kong, Macau and Taiwan (the “Licensed Territory”). Under the terms of the EOC License Agreement, the Company granted to EOC an exclusive, royalty-bearing license to develop and commercialize the product in the Licensed Territory.

Unless earlier terminated, the term of the EOC License Agreement continues until the expiration of the royalty obligations. EOC has the right to terminate the agreement for any reason upon 120 days advance written notice. Either party may terminate the EOC License Agreement in the event that the other party breaches the agreement and fails to cure the breach, becomes insolvent or challenges certain of the intellectual property rights licensed under the agreement.

The Company assessed the EOC License Agreement and concluded that EOC is a customer and identified the license of FYARRO provided to EOC as the sole performance obligation. The $14.0 million upfront payment received from EOC is non-refundable and non-creditable and is considered fixed consideration. The Company recognized revenue of $14.0 million in the year ended December 31, 2020 when the EOC License Agreement was signed, and the $14.0 million upfront payment was received in January 2021.

The potential milestone payments and royalty payments under the EOC License Agreement are considered variable consideration and are constrained with respect to revenue recognition notification from EOC that the milestone and royalty payments have been achieved.

The Company is eligible to receive an additional $257.0 million in the aggregate upon achievement of certain development, regulatory, and sales milestones, as well as tiered royalties on net sales in the Licensed Territory. Under the terms of the EOC License Agreement, EOC will fund all research, development, regulatory, marketing and commercialization activities in the defined Licensed Territory. The Company earned $1.0 million in milestone revenue upon achievement of the FDA approval milestone on November 22, 2021. EOC paid the $1.0 million milestone payment in December 2021. In accordance with the Company’s agreement with Celgene, 20% of the $1.0 million payment, or $0.2 million was accrued at December 31, 2021, for payment to Celgene in January 2022.

Convertible Notes

12 Months Ended

Dec. 31, 2021

Debt Disclosure [Abstract]

Convertible Notes

9. Convertible Notes

Private Aadi received $8.1 million in October 2019 and $1.0 million in January 2020 for the proceeds in connection with the issuance of Convertible Notes. The October 2019 Convertible Notes were issued to existing equity holders of Private Aadi. The Convertible Notes issued in October 2019 and January 2020 originally had a maturity date of one year from the date of issuance and an escalating interest rate of 6% per annum for the first four months following the effective date of the loan agreement, 8% per annum for the fifth and sixth months, and 10% per annum for the remaining six months of the note term until maturity at twelve months. The Convertible Notes contain certain redemption features, including conversion to preferred stock upon the closing of Private Aadi’s next issuance of preferred stock resulting in net proceeds to the Company of at least $25.0 million (“Qualified Financing”). The Convertible Notes would convert into a variable, whole number of preferred shares equal to the number obtained by dividing the principal plus accrued interest of the Convertible Notes by 80% of the price per share paid by cash investors in the Qualifying Financing if converted in the first four months following the effective date of the loan agreement, 75% if converted in months five or six, and 70% if converted later than six months. The Convertible Notes also contained a mandatory prepayment provision that required Private Aadi to pay the outstanding principal, plus accrued and unpaid interest together with a premium in the event that a qualified liquidity event occurred. The premium was equal to 120% of the outstanding principal amount to be prepaid in the event the liquidity event occurs within four months of the note date, 130% between the fifth and sixth month, and 140% if after the sixth month but prior to maturity.

In November 2020, Private Aadi entered into an amendment to the October 2019 and January 2020 Convertible Notes, whereby the term was extended from one year to two years. The amendment was accounted for as a debt modification.

In May 2021, Private Aadi entered into an amendment to the October 2019 and January 2020 Convertible Notes, whereby upon the closing of the Merger (see Note 1), the outstanding principal amount of the Convertible Notes and all accrued and unpaid interest as of immediately prior to the closing of the Merger would automatically convert into fully paid and nonassessable shares of Private Aadi common stock at a price per share equal to $4.80 and would be concurrently exchanged for shares of the Company’s common stock based on the Exchange Ratio. In conjunction with the closing of the Merger on August 26, 2021, the outstanding Convertible Notes were converted into shares of Private Aadi common stock which were concurrently exchanged for 698,018 shares of the Company’s common stock after taking into account the Exchange Ratio. At the date of conversion, the convertible notes were marked to market.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References

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+ Details

Payroll Protection Program Loan

12 Months Ended

Dec. 31, 2021

Payroll Protection Program Loan [Abstract]

Payroll Protection Program Loan

10. Payroll Protection Program Loan

On March 27, 2020, President Trump signed into law the Coronavirus Aid, Relief and Economic Security Act (the “CARES Act”). The CARES Act, among other things, includes provisions relating to refundable payroll tax credits, deferment of employer side social security payments, net operating loss carryback periods, alternative minimum tax credit refunds, modifications to the net interest deduction limitations and technical corrections to tax depreciation methods for qualified improvement property. The CARES Act also appropriated funds for the Small Business Administration (“SBA”) Paycheck Protection Program (“PPP”) loans that are forgivable in certain situations to promote continued employment, as well as Economic Injury Disaster Loans to provide liquidity to small businesses harmed by COVID-19.

In May 2020, Aadi was approved for a $0.2 million SBA PPP loan, as provided for in the CARES Act (“PPP Loan”). Under certain conditions, the PPP Loan and accrued interest are forgivable after a twenty-four-week covered period as long as the loan proceeds were used for eligible expenses, including payroll, benefits, rent and

utilities, and the company maintains certain payroll levels. The amount of loan forgiveness is subject to reduction if the Company terminates employees or reduces salaries during the twenty-four-week covered period. The unforgiven portion of the loan is payable over two years at an interest rate of 1%, with a deferral of payments for the ten months following the end of the twenty-four-week covered period. On April 29, 2021, the Company received notification from the SBA that the Company’s Forgiveness Application of the PPP Loan and accrued interest was approved in full, and the Company had no further obligations related to the PPP Loan. Accordingly, the Company recorded a gain on the forgiveness of the PPP Loan totaling $0.2 million.

The SBA has stated that all PPP loans in excess of $2 million, and other PPP loans as appropriate, will be subject to review by the SBA for compliance with program requirements. If the SBA determines in the course of its review that a borrower lacked an adequate basis for the required certification concerning the necessity of the loan request or the subsequent use of loan proceeds, the SBA will seek repayment of the PPP loan, including interest and potential penalties. While the Company believes the loan was properly obtained and forgiven, there can be no assurance regarding the outcome of an SBA review. The Company has not accrued any liability associated with the risk of an adverse SBA review.

Common Stock

12 Months Ended

Dec. 31, 2021

Equity [Abstract]

Common Stock

11. Common Stock

Preferred Stock

As of December 31, 2021, under the Company’s certificate of incorporation, as amended and restated, the Company has 10,000,000 shares of preferred stock, par value $0.0001 per share, in authorized capital with no shares outstanding.

Series Seed Preferred Stock

On February 23, 2017, Private Aadi converted from a limited liability company to a corporation and at that time converted 734,218 membership units into shares of Series Seed Preferred Stock. All outstanding shares of Series Seed Preferred Stock were converted into Private Aadi’s common stock and concurrently exchanged for the Company’s common stock based on the Exchange Ratio in connection with the closing of the Merger.

Series A Preferred Stock

In February and March 2017, Private Aadi sold and issued in a private placement 5,847,940 shares of Series A Preferred Stock at $3.42 per share (the “Series A Financing”). Upon the closing of the Series A Financing, convertible notes issued in 2015 converted into 482,426 shares of Series A Preferred Stock at 85% of the $3.42 price per share (the “Series A Original Issue Price”) paid by the Series A Financing investors. Convertible notes issued in 2017 converted into 881,286 shares of Series A Preferred Stock at the Series A Original Issue Price. All outstanding shares of Series A Preferred Stock were converted into shares of Private Aadi common stock and concurrently exchanged for the Company’s common stock based on the Exchange Ratio in connection with the closing of the Merger. Upon the closing of the Merger, Private Aadi’s board of directors declared a 4% cumulative dividend on its preferred stock of $4.4 million which was paid at the Effective Time.

Common Stock

As of December 31, 2021 and 2020, the Company had 300,000,000 and 20,000,000 shares of authorized common stock with par value of $0.0001 per share, respectively, under the Company’s certificate of incorporation, as amended and restated. As of December 31, 2021 and 2020, the shares of common stock outstanding were 20,894,695 and 2,542,358, respectively.

In conjunction with the closing of the Merger, the Company issued an aggregate of 2,558,218 shares of common stock to holders of Private Aadi common stock in exchange for all of the Private Aadi capital stock outstanding immediately prior to the closing of the Merger. Concurrently with the closing of the Merger, the PIPE Investors purchased an aggregate of 11,852,862 shares of the Company’s common stock for an aggregate purchase price of $155.0 million pursuant to the Subscription Agreement entered into with the Company on May 16, 2021. The aggregate net proceeds, after deducting certain expenses incurred that were direct and incremental to the issuance of the PIPE shares, was $145.4 million.

Dividends

The holders of common stock are entitled to receive dividends, if and when declared by the board of directors of the Company (the “board of directors”). Since the Company’s inception, no dividends have been declared or paid to the holders of common stock.

Liquidation

In the event of any voluntary or involuntary liquidation, dissolution, or winding-up of the Company, the holders of common stock are entitled to share ratably in the Company’s assets.

Voting

The holders of common stock are entitled to one vote for each share of common stock held at all meetings of stockholders and written actions in lieu of meetings.

Stock-Based Compensation

12 Months Ended

Dec. 31, 2021

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-Based Compensation

12. Stock-Based Compensation

Stock Option Plan – 2014 Plan (“Private Aadi Plan”)

In connection with the Merger, the Company assumed Private Aadi Plan, which was amended and restated in February 2017, and the issued and outstanding stock options under the Private Aadi Plan (the Private Aadi common stock underlying the awards was adjusted for shares of the Company’s common stock pursuant to the Merger Agreement). The Private Aadi Plan allowed for the grant of incentive stock options, non-statutory stock options, stock appreciation rights, restricted stock unit awards and other stock awards. In connection with the closing of the Merger and the adoption of the 2021 Plan (as defined below), no further awards will be issued under the Private Aadi Plan.

The options that are granted from the Private Aadi Plan are exercisable at various dates as determined upon grant and will expire no more than ten years from their date of grant. The Private Aadi Plan stock options generally vest over a four-year term.

Stock Option Plan – 2011 Plan and 2017 Plan

In connection with the closing of the Merger, the Company assumed the Aerpio 2011 Equity Incentive Plan (the “2011 Plan”) and the Aerpio 2017 Stock Option and Incentive Plan (the “2017 Plan,” and collectively with the 2011 Plan, the “Prior Plans”). No new awards will be granted under the Prior Plans effective upon the closing of the Merger and adoption of the 2021 Plan (as defined below).

Stock Option Plan – 2021 Plan

At the closing of the Merger, the Company adopted the Aadi Bioscience, Inc. 2021 Equity Incentive Plan (the “2021 Plan”), which also permits stock options and restricted stock unit grants to employees, members of the board of directors, and outside consultants.

Subject to the adjustment provisions contained in the 2021 Plan and the evergreen provision described below, a total of 2,070,784 shares of common stock were initially reserved for issuance pursuant to the 2021 Plan. In addition, the shares reserved for issuance under the 2021 Plan include any shares of common stock (i) subject to awards of stock options or other awards granted under the Prior Plans that expire or otherwise terminate without having been exercised in full and shares of common stock granted under the Prior Plans that are forfeited or repurchased by the Company, and (ii) any shares of common stock subject to stock options or similar awards granted under the Private Aadi Plan that were assumed in the Merger (provided that the maximum number of shares that may be added to the 2021 Plan pursuant to this sentence is 764,154 shares).

The number of shares available for issuance under the 2021 Plan also will include an annual increase, or the evergreen feature, on the first day of each of the Company’s fiscal years, beginning with the Company’s fiscal year 2022, equal to the least of:

•

2,070,784 shares of common stock;

•

a number of shares equal to 4% of the outstanding shares of common stock on the last day of the immediately preceding fiscal year; or

•

such number of shares as the Board or its designated committee may determine.

As a result of the evergreen increase, a total of 835,787 shares were added to the 2021 Plan on January 1, 2022.

Shares issuable under the 2021 Plan are authorized, but unissued, or reacquired shares of common stock. If an award expires or becomes unexercisable without having been exercised in full, is surrendered pursuant to an exchange program, or, with respect to restricted stock, restricted stock units, performance units or performance shares, is forfeited to or repurchased by the combined company due to failure to vest, the unpurchased shares (or for awards other than stock options or stock appreciation rights, the forfeited or repurchased shares) will become available for future grant or sale under the 2021 Plan (unless the 2021 Plan has terminated).

As of December 31, 2021, zero, 432,978, 126,267 and 1,190,631 shares were subject to awards outstanding under the 2011 Plan, Private Aadi Plan, 2017 Plan and 2021 Plan, respectively.

The following table summarizes the stock option activity during the twelve months ended December 31, 2021 and December 31, 2020:

	Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in Years)		Aggregate Intrinsic Value (in thousands)
Outstanding, January 1, 2021		390,949		$	2.11		7.26	$	505
Granted		1,248,520			26.05
Assumed through Merger		248,258			29.20
Exercised		(72,316	)		11.52
Expired/cancelled		(65,535	)		53.99
Outstanding as of December 31, 2021		1,749,876		$	20.71		8.48	$	10,007
Vested and exercisable as of December 31, 2021		444,700		$	8.63	$	5.05	$	7,585
Vested and expected to vest as of December 31, 2021		1,749,876		$	20.71		8.48	$	10,007

As of December 31, 2021, the aggregate intrinsic value of options outstanding was $10.0 million. The intrinsic value for stock options is calculated based on the difference between the exercise prices of the underlying awards and the quoted stock price of the Company’s common stock as of the reporting date.

As of December 31, 2021, there was $22.1 million of unrecognized compensation cost related to stock options, which is expected to be recognized over a weighted average period of 2.9 years.

As of December 31, 2021, zero and 1,390,606 shares were reserved for issuance under the Private Aadi Plan and 2021 Plan, respectively.

Compensation Expense Summary

The Company recognized the following compensation cost related to employee and non-employee stock-based compensation activity for the periods presented (amounts in thousands):

	Year Ended December 31,
	2021		2020
Research and development	$	657	$	94
General and administrative		1,449		45
Total	$	2,106	$	139

Included in the twelve months ended December 31, 2021 is $0.3 million of expense related to the acceleration of vesting associated with individual awards assumed in the Merger.

The Company uses the Black-Scholes option pricing model to determine the estimated fair value for stock-based awards. Option pricing and models require the input of various assumptions, including the option’s expected life, expected dividend yield, price volatility and risk-free interest rate of the underlying stock. Accordingly, the weighted-average fair value of the options granted during the twelve months ended December 31, 2021 and 2020 was $18.88 and $2.56 per share, respectively.

The calculation was based on the following assumptions:

	Year Ended December 31,
	2021		2020
Weighted average grant date fair value (per share)	$	18.88	$	2.56
Risk-free interest rate	0.84% - 1.38%		0.34% - 0.80%
Expected volatility	85.21% - 87.88%		89.57% - 92.52%
Expected term (in years)	5.1 - 6.3		5.3 - 6.3
Expected dividend yield		—		—

The Company determines the assumptions used in the option pricing model in the following manner:

Risk-Free Interest Rate – For the determination of the risk-free interest rates, the Company utilizes the U.S. Treasury yield curve for instruments in effect at the time of measurement with a term commensurate with the expected term assumption.

Expected Volatility – Due to the Company’s limited historical stock price volatility data, the Company based its estimate of expected volatility on the estimated and expected volatilities of a guideline group of publicly traded companies. For these analyses, the Company selected companies with comparable characteristics including enterprise value, risk profiles, and with historical share price information sufficient to meet the expected life of the stock-based awards. The Company computes the historical volatility data using the daily closing prices for the selected companies’ shares during the equivalent period of the calculated expected term of its stock-based awards. The Company will continue to apply this process until a sufficient amount of historical information regarding the volatility of its own stock price becomes available.

Expected Dividend – The expected dividend yield is assumed to be zero since the Company has never paid dividends and does not have current plans to pay any dividends on its common stock.

Expected Term – The Company estimates the expected term of its stock options granted to employees and non-employee directors using the simplified method, whereby, the expected term equals the average of the vesting term and the original contractual term of the option. The Company utilizes this method since it does not have sufficient historical exercise data to provide a reasonable basis upon which to estimate the expected term.

Prior to the Company’s Merger, given the absence of a public trading market for the Company’s common stock, its board of directors exercised their judgment and considered a number of objective and subjective factors to determine the best estimate of the fair value of the Company’s common stock underlying the stock options, such as: contemporaneous valuations performed by independent third-party specialists, its stage of development, including the status of its research and development efforts of its therapeutic candidates and the material risks related to its business and industry, its results of operations and financial condition, including its levels of capital resources, the prices at which its sold shares of its convertible preferred stock, the rights, preferences and privileges of its convertible preferred stock relative to those of its common stock, the conditions in the biotechnology industry and the economy in general, the stock price performance and volatility of comparable life sciences public companies, as well as recently completed mergers and acquisitions of peer companies, the likelihood of achieving a liquidity event for the holders of its common stock or convertible preferred stock, such as an IPO or a sale of the Company given prevailing market conditions, trends and developments in its industry, external market conditions affecting the life sciences and biotechnology sectors, and the lack of liquidity of its common stock, among other factors.

Subsequent to the Company’s Merger, the fair value of the Company’s common stock is determined based on its closing market price on the date of the grant. The Company’s board of directors intended all options granted to be exercisable at a price per share not less than the per share fair value of its common stock underlying those options on the grant date.

Warrants to Purchase Common Stock

The Company had warrants outstanding for the purchase of 36,666 shares of the Company’s common stock at December 31, 2021. There were no warrants outstanding as of December 31, 2020. These warrants were assumed in the Merger and were issued by Aerpio in October 2019, for the purchase of 40,000 shares (after taking into account the Reverse Stock Split) of the Company’s common stock at an exercise price of $7.29 per share (after taking into account the Reverse Stock Split). These warrants were fully vested as of the date of the Merger and expire on October 24, 2024.

The number of shares and the exercise price shall be adjusted for standard anti-dilution events such as stock splits, combinations, reorganizations, or issue shares as part of a stock dividend. The warrants meet the criteria to be classified within stockholders’ equity (deficit).

Employee Stock Purchase Plan

12 Months Ended

Dec. 31, 2021

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Employee Stock Purchase Plan

13. Employee Stock Purchase Plan

On August 17, 2021, a special meeting of the Company’s stockholders was held to approve the Merger and related matters which included, among others, an employee stock purchase plan (“Special Meeting”). At the Special Meeting, the Company’s stockholders considered and approved the Company’s 2021 Employee Stock Purchase Plan (the “2021 ESPP”). Upon approval of the 2021 ESPP by the stockholders, Aerpio’s Amended and Restated 2017 Employee Stock Purchase Plan terminated. An aggregate of 310,617 shares of common stock have been reserved and are available for issuance under the 2021 ESPP. The number of shares of common stock available for issuance under the 2021 ESPP will be increased on the first day of each fiscal year beginning with the 2022 fiscal year in an amount equal to the least of (i) 310,617 shares of common stock, (ii) one percent (1%) of the outstanding shares of all classes of common stock on the last day of the immediately preceding fiscal year, or (iii) an amount to be determined by the Board or its designated committee no later than the last day of the immediately preceding fiscal year. On January 1, 2022, 208,946 shares of common stock were added to the 2021 ESPP. Shares of common stock issuable under the 2021 ESPP will be authorized, but unissued, or reacquired shares of common stock. If the Company’s capital structure changes because of a stock dividend, stock split or similar event, the number of shares that can be issued under the 2021 ESPP will be appropriately adjusted. No shares were issued under the 2021 ESPP as of December 31, 2021.

Income Taxes

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Income Taxes

14. Income Taxes

The Company did not record a current or deferred income tax expense or benefit for the years ended December 31, 2021 and 2020, due to the Company’s net and comprehensive losses and increases in its deferred tax asset valuation allowance. A reconciliation of the statutory federal income tax with the provision for income taxes are as follows:

	Year Ended December 31,
	2021				2020
Federal tax at statutory rate		21.0		%		21.0		%
State income tax, net of federal benefit		0.5				2.5
Nondeductible interest		(0.1	)			(4.9	)
Other permanent items		0.4				(1.6	)
Nondeductible impairment		(13.8	)			—
Research credit		0.9				28.8
Change in valuation allowance		(8.9	)			(45.7	)
Effective tax rate	$	—		%		0.1		%

Significant components of the Company’s deferred tax assets and liabilities are as follows (amounts in thousands):

	December 31,
	2021			2020
Deferred tax assets:
Net operating loss carryforwards	$	34,228		$	7,265
Research and development tax credits		3,732			2,782
Other		1,214			227
Total deferred tax assets		39,174			10,274
Valuation allowance		(38,410	)		(10,255	)
Total gross deferred tax assets, net of valuation allowance		764			19
Deferred tax liabilities:
Other		(764	)		(19	)
Total gross deferred tax liabilities		(764	)		(19	)
Net deferred tax assets / (liabilities)	$	—		$	—

Deferred income tax assets and liabilities are recorded for differences between the financial statement and tax basis of the assets and liabilities that will result in taxable or deductible amounts in the future based on enacted laws and rates applicable to the periods in which the differences are expected to affect taxable income. Valuation allowances are established when necessary to reduce deferred tax assets to the amount expected to be realized in future periods.

The Company has evaluated the available evidence supporting the realization of its gross deferred tax assets, including the amount and timing of future taxable income and has determined it is more likely than not that the assets will not be realized. As a result, the Company has concluded that a full valuation allowance against its deferred tax asset is necessary at this time.

As of December 31, 2021, the Company has federal and state net operating loss (“NOL”) carryforwards of $150.9 million and $55.8 million, respectively. Of the amount of federal NOL carryforwards, $106.6 million can be carried forward indefinitely. The remaining federal and state NOL carryforwards begin to expire in 2030, unless previously utilized. The Company also has federal and state research credit carryforwards of approximately $3.1 million and $1.7 million, respectively, unless previously utilized. The federal and New Jersey research credit carryforwards will begin to expire in 2037 and 2027, respectively, unless previously utilized. The California research and development (“R&D”) credit will carry forward indefinitely. The increase in the valuation allowance is $28.2 million and $1.6 million for the years ended December 31, 2021 and 2020, respectively.

Pursuant to Section 382 and 383 of the Internal Revenue Code (“IRC”), utilization of the Company’s NOL carryforwards and R&D credits may be subject to annual limitations in the event of any significant future changes in its ownership structure. These annual limitations may result in the expiration of NOL carryforwards and R&D credits prior to utilization. As of December 31, 2021, the Company has completed an IRC Section 382 analysis through the date of the Merger. Ownership changes were identified that will result in annual limitations on future utilization of NOL and R&D credit carryforwards. To the extent such limitations will cause NOL and R&D credit carryforwards to expire unused, these tax attributes have been removed from deferred tax asset table above.

Uncertain tax positions are evaluated based upon the facts and circumstances that exist at each reporting period. Subsequent changes in judgement based upon new information may lead to changes in recognition, derecognition, and measurement. Adjustment may result, for example, upon resolution of an issue with the taxing authorities or expiration of a statute of limitations barring an assessment for an issue.

The Company recognizes a tax benefit from an uncertain tax position when it is more likely than not that the position will be sustained upon examination by tax authorities.

The following table summarizes the changes to the Company’s gross unrecognized tax benefits for the years ended December 31, 2021 and 2020 (amounts in thousands):

	December 31,
	2021			2020
Balance at the beginning of the year	$	2,404		$	2,210
Decrease related to prior year positions		(24	)		—
Increase related to current year positions		294			194
Balance at the end of the year	$	2,674		$	2,404

Due to the existence of the valuation allowance, future recognition of previously unrecognized tax benefits will not impact the Company’s effective tax rate. The Company’s practice is to recognize interest and penalties related to income tax matters in income tax expense. The Company is subject to taxation in the United States federal and certain state jurisdictions. The Company’s tax years from inception are subject to examination by the United States federal and state authorities due to the carryforward of unutilized NOLs and R&D credits.

The Company had no accrued interest and no penalties related to income tax matters in the Company’s balance sheet as of December 31, 2021 and has not recognized interest or penalties in the Company’s statement of operations and loss for the year ended December 31, 2021. Further, the Company is not currently under examination by any federal, state or local tax authority.

The CARES Act provides sweeping tax changes in response to the COVID-19 pandemic. Some of the more significant provisions are removal of certain limitations on utilization of NOL’s, increasing the loss carryback period

for certain losses to five years, and increasing the ability to deduct interest expense, as well as amending certain provisions of the previously enacted Tax Cuts and Jobs Act. As of December 31, 2021, the Company has not recorded any material adjustments to its income tax provision related to the provisions with the CARES Act. The Company will continue to analyze the impact that the CARES Act will have, if any, on its financial positions, results of operations or cash flows.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Commitments and Contingencies

12 Months Ended

Dec. 31, 2021

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

15. Commitments and Contingencies

Litigation

The Company is not party to any material legal proceedings. From time to time, it may be involved in legal proceedings or subject to claims incident to the ordinary course of business. Regardless of the outcome, such proceedings or claims can have an adverse impact on the Company because of defense and settlement costs, diversion of resources and other factors, and there can be no assurances that favorable outcomes will be obtained.

Purchase Commitments

The Company has ongoing contracts with vendors for clinical trials and contract manufacturing. These contracts are generally cancellable, with notice, at the Company’s option. The Company recorded accrued expenses of $4.8 million and $3.3 million in its consolidated balance sheet for expenditures incurred by clinical and contract manufacturing vendors as of December 31, 2021 and 2020, respectively.

At December 31, 2021 the Company does not have any significant contracts that contain specific activities such as non-cancellable commitments, minimum purchase commitments, or binding annual forecasts.

Employee Retirement Plan

12 Months Ended

Dec. 31, 2021

Compensation And Retirement Disclosure [Abstract]

Employee Retirement Plan

16. Employee Retirement Plan

The Company maintains a 401(k) plan (the “401k Plan”) created in 2015 for the benefit of its employees. All employees who have attained the age of 21 are eligible to participate in the 401k Plan as of the first Entry Date, as defined by the 401k Plan document, following the employment date. Each employee can contribute a percentage of compensation up to a maximum of the statutory limits per year. Company contributions are discretionary. No contributions were made during 2021 or 2020.

- Definition

The entire disclosure for retirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
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+ Details

Subsequent Events

12 Months Ended

Dec. 31, 2021

Subsequent Events [Abstract]

Subsequent Events

17. Subsequent Events

On January 13, 2022, the Company entered into a Negotiated Purchase Order Terms and Conditions for Clinical and Commercial Product (the “Fresenius Agreement”) with Fresenius Kabi, LLC (“Fresenius Kabi”) pursuant to which Fresenius Kabi will manufacture FYARRO for the Company, and the Company will purchase FYARRO as a finished drug product from Fresenius Kabi, on a purchase-order basis. Under the Agreement, which shall be effective through December 22, 2022 (or such later date as may be agreed between the parties in writing and currently being discussed), the Company may purchase FYARRO for either clinical or commercial purposes for use in the United States and Canada. In addition to manufacturing, Fresenius Kabi will perform specified labeling, packaging and serialization activities in respect of FYARRO for the Company’s benefit. The price of FYARRO will be fixed, subject to the ability of Fresenius Kabi to increase pricing under specified circumstances. The Company has an obligation to purchase certain minimum quantities of FYARRO. Failure to purchase those minimum quantities will result in an additional payment from the Company to Fresenius Kabi.

Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2021

Accounting Policies [Abstract]

Basis of Presentation

Segment Information

Use of Estimates

Concentration of Credit Risk

Cash and Cash Equivalents

Fair Value Options

Fair Value Option

Fair Value of Financial Instruments

Level 1: Observable inputs, such as quoted prices in active markets

Level 2: Inputs, other than the quoted prices in active markets that are observable either directly or indirectly

Recurring fair value measurements:

	Fair Value Measurements as of December 31, 2021
	Level 1		Level 2		Level 3		Total
Assets:
Money market funds (1)	$	140,032	$	—	$	—	$	140,032

	Fair Value Measurements as of December 31, 2020
	Level 1		Level 2		Level 3		Total
Assets:
Money market funds (1)	$	3,041	$	—	$	—	$	3,041
Liabilities:
Convertible promissory notes	$	—	$	—	$	10,131	$	10,131

(1)

Included in cash and cash equivalents in the accompanying balance sheets.

Non-Recurring fair value measurement:

	Fair Value Measurements as of December 31, 2021
	Level 1		Level 2		Level 3		Total
Assets:
Intangible asset	$	-	$	-	$	3,811	$	3,811

Intangible Asset

•

See Notes 4 and 5 for further discussion of the Intangible Asset acquired through the Merger.

Convertible Note

The following table provides a reconciliation of the Convertible Notes (refer to Note 9) measured at fair value using significant unobservable inputs (Level 3) (amounts in thousands):

	Convertible Notes
	(Level 3)
Balance as of December 31, 2019	$	8,165
Issuance of convertible promissory notes		1,000
Accrued interest		813
Change in fair value of convertible promissory notes		153
Balance as of December 31, 2020	$	10,131
Issuance of convertible promissory notes		-
Accrued interest		584
Change in fair value of convertible promissory notes		(1,585	)
Converted into common stock		(9,130	)
Balance as of December 31, 2021	$	—

There have been no transfers between levels during the reporting periods.

Accounts Receivable

Inventory

Property and Equipment, Net

Intangible Asset

Impairment of Long-Lived Assets

Leases

Commitments and Contingencies

Revenue Recognition

Grant Revenue

Revenue Under License Agreement

Research and Development

Share-Based Compensation

Income Taxes

Net and Comprehensive Loss per Share Attributable to Common Stockholders

	Year Ended December 31,
	2021		2020
Options to purchase common stock		1,750		391
Warrants to purchase common stock		37		—
Series Seed convertible preferred stock		—		734
Series A convertible preferred stock		—		7,212

Accounting Pronouncements Not Yet Adopted

Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

Accounting Policies [Abstract]

Schedule of Assets and Liabilities Measured on Recurring Basis

Recurring fair value measurements:

	Fair Value Measurements as of December 31, 2021
	Level 1		Level 2		Level 3		Total
Assets:
Money market funds (1)	$	140,032	$	—	$	—	$	140,032

	Fair Value Measurements as of December 31, 2020
	Level 1		Level 2		Level 3		Total
Assets:
Money market funds (1)	$	3,041	$	—	$	—	$	3,041
Liabilities:
Convertible promissory notes	$	—	$	—	$	10,131	$	10,131

(1)

Included in cash and cash equivalents in the accompanying balance sheets.

Schedule of Assets and Liabilities Measured on Non-Recurring Basis

Non-Recurring fair value measurement:

	Fair Value Measurements as of December 31, 2021
	Level 1		Level 2		Level 3		Total
Assets:
Intangible asset	$	-	$	-	$	3,811	$	3,811

Reconciliation of Convertible Notes Measured at Fair Value Significant Unobservable Inputs

The following table provides a reconciliation of the Convertible Notes (refer to Note 9) measured at fair value using significant unobservable inputs (Level 3) (amounts in thousands):

	Convertible Notes
	(Level 3)
Balance as of December 31, 2019	$	8,165
Issuance of convertible promissory notes		1,000
Accrued interest		813
Change in fair value of convertible promissory notes		153
Balance as of December 31, 2020	$	10,131
Issuance of convertible promissory notes		-
Accrued interest		584
Change in fair value of convertible promissory notes		(1,585	)
Converted into common stock		(9,130	)
Balance as of December 31, 2021	$	—

Schedule of Potentially Dilutive Securities Excluded from Calculation of Diluted Net Loss Per Share

	Year Ended December 31,
	2021		2020
Options to purchase common stock		1,750		391
Warrants to purchase common stock		37		—
Series Seed convertible preferred stock		—		734
Series A convertible preferred stock		—		7,212

Merger (Tables)

12 Months Ended

Dec. 31, 2021

Business Combinations [Abstract]

Schedule of Estimated Fair Value Consideration

Number of common shares of the combined company to be owned by Aerpio shareholders		3,208,718
Multiplied by the fair value per share of Aerpio common stock on August 26, 2021	$	33.00
Fair value of Aerpio common stock		105,887,694
Aadi transaction costs		4,500,864
Purchase price	$	110,388,558

Summary of Allocation of Purchase Price

The allocation of the purchase price is as follows (amounts in thousands):

	August 26, 2021
Cash and cash equivalents	$	29,700
Other current assets		2,709
Intangible asset (1)		78,062
Deposits		20
Accounts payable and accrued liabilities		(103	)
Purchase price	$	110,388

(1)

Intangible Asset (Tables)

12 Months Ended

Dec. 31, 2021

Goodwill And Intangible Assets Disclosure [Abstract]

Summary of Estimated Amortization Expense Related to Finite Lived Intangible Asset

The estimated amortization expense related to this finite lived intangible asset for the five succeeding years is as follows (amounts in thousands):

	December 31,
	2021
Intangible asset	$	3,906
Less amortization		(95	)
Intangible asset, net	$	3,811

2022	$	273
2023		273
2024		273
2025		273
2026		273
Amounts thereafter		2,446
	$	3,811

Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2021

Accrued Liabilities Current [Abstract]

Schedule of Accrued Liabilities

Details of accrued liabilities are presented as follows (amounts in thousands):

	December 31,
	2021		2020
Accrued clinical	$	2,507	$	2,017
Accrued contract manufacturing		2,287		1,301
Accrued bonus		1,465		597
Accrued professional fees		1,948		11
Accrued other		238		173
Total accrued liabilities	$	8,445	$	4,099

Operating Lease (Tables)

12 Months Ended

Dec. 31, 2021

Leases [Abstract]

Summary of Information Related to Lease

The following table summarizes information related to the Company’s lease (amounts in thousands):

	December 31,
	2021		2020
Assets:
Operating lease right-of-use assets	$	557	$	119
Total right-of-use assets	$	557	$	119

Liabilities:
Operating lease liabilities, current	$	131	$	125
Operating lease liabilities, non-current		474		—
Total operating lease liabilities	$	605	$	125

Schedule of Rent Expense

Rent expense related to this lease each of the twelve months ended December 31, 2021 and December 31, 2020 is presented on the following table (amounts in thousands):

	December 31,
	2021		2020
Cash paid included in operating cash flows	$	146	$	195
Operating leases rent expense	$	188	$	183

Summary of Future Minimum Lease Payments Required under Operating Lease

The future minimum lease payments required under the operating lease as of December 31, 2021, are summarized below (amounts in thousands):

Future Minimum Lease Payments:
2022	$	169
2023		231
2024		238
2025		40
Total minimum lease payments	$	678
Less: amount representing interest		(73	)
Present value of operating lease liabilities	$	605
Less: operating lease liabilities, current		(131	)
Operating lease liabilities, non-current	$	474
Remaining lease term (in years)	3.17
Incremental borrowing rate		6.80	%

Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2021

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock Option Activity

The following table summarizes the stock option activity during the twelve months ended December 31, 2021 and December 31, 2020:

	Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in Years)		Aggregate Intrinsic Value (in thousands)
Outstanding, January 1, 2021		390,949		$	2.11		7.26	$	505
Granted		1,248,520			26.05
Assumed through Merger		248,258			29.20
Exercised		(72,316	)		11.52
Expired/cancelled		(65,535	)		53.99
Outstanding as of December 31, 2021		1,749,876		$	20.71		8.48	$	10,007
Vested and exercisable as of December 31, 2021		444,700		$	8.63	$	5.05	$	7,585
Vested and expected to vest as of December 31, 2021		1,749,876		$	20.71		8.48	$	10,007

Summary of Recognized Compensation Cost Related to Employee and Non-employee Stock-Based Compensation Activity

The Company recognized the following compensation cost related to employee and non-employee stock-based compensation activity for the periods presented (amounts in thousands):

	Year Ended December 31,
	2021		2020
Research and development	$	657	$	94
General and administrative		1,449		45
Total	$	2,106	$	139

Stock Options Valuation Assumptions

The calculation was based on the following assumptions:

	Year Ended December 31,
	2021		2020
Weighted average grant date fair value (per share)	$	18.88	$	2.56
Risk-free interest rate	0.84% - 1.38%		0.34% - 0.80%
Expected volatility	85.21% - 87.88%		89.57% - 92.52%
Expected term (in years)	5.1 - 6.3		5.3 - 6.3
Expected dividend yield		—		—

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Schedule of Reconciliation of Statutory Federal Income Tax

A reconciliation of the statutory federal income tax with the provision for income taxes are as follows:

	Year Ended December 31,
	2021				2020
Federal tax at statutory rate		21.0		%		21.0		%
State income tax, net of federal benefit		0.5				2.5
Nondeductible interest		(0.1	)			(4.9	)
Other permanent items		0.4				(1.6	)
Nondeductible impairment		(13.8	)			—
Research credit		0.9				28.8
Change in valuation allowance		(8.9	)			(45.7	)
Effective tax rate	$	—		%		0.1		%

Schedule of Significant Components of Deferred Tax Assets and Liabilities

Significant components of the Company’s deferred tax assets and liabilities are as follows (amounts in thousands):

	December 31,
	2021			2020
Deferred tax assets:
Net operating loss carryforwards	$	34,228		$	7,265
Research and development tax credits		3,732			2,782
Other		1,214			227
Total deferred tax assets		39,174			10,274
Valuation allowance		(38,410	)		(10,255	)
Total gross deferred tax assets, net of valuation allowance		764			19
Deferred tax liabilities:
Other		(764	)		(19	)
Total gross deferred tax liabilities		(764	)		(19	)
Net deferred tax assets / (liabilities)	$	—		$	—

Summary of Changes to Gross Unrecognized Tax Benefits

The following table summarizes the changes to the Company’s gross unrecognized tax benefits for the years ended December 31, 2021 and 2020 (amounts in thousands):

	December 31,
	2021			2020
Balance at the beginning of the year	$	2,404		$	2,210
Decrease related to prior year positions		(24	)		—
Increase related to current year positions		294			194
Balance at the end of the year	$	2,674		$	2,404

Nature of Organization and Operations - Additional Information (Detail) $ in Thousands			12 Months Ended
	Aug. 26, 2021 USD ($) shares	May 16, 2021	Dec. 31, 2021 USD ($) shares	Dec. 31, 2020 USD ($) shares
Organization Consolidation And Presentations Of Financial Statements [Line Items]
Issuance of common stock, Shares \| shares	2,558,218
Anniversary effective term period	20 years
Aggregate proceeds from issuance of common stock			$ 155,000
Aggregate net proceeds from issuance of common stock			$ 145,400
Common stock, shares outstanding \| shares	2,500,000		20,894,695	2,542,358
Accumulated deficit			$ 142,685	$ 32,595
Net loss			110,090	3,478
Cash received from Aerpio in merger			29,700
Cash received from Aerpio in merger, net			27,700
Cash received from Aerpio in merger after compensation expenses			2,000
Cash and cash equivalents			$ 148,989	$ 4,455
PIPE Investors [Member]
Organization Consolidation And Presentations Of Financial Statements [Line Items]
Ownership percentage on common stock	55.60%
Former Shareholders of Aadi [Member]
Organization Consolidation And Presentations Of Financial Statements [Line Items]
Ownership percentage on common stock	29.20%
Former Stockholders/Executives of Aerpio Upon Merger [Member]
Organization Consolidation And Presentations Of Financial Statements [Line Items]
Ownership percentage on common stock	15.20%
Merger Agreement [Member]
Organization Consolidation And Presentations Of Financial Statements [Line Items]
Date of acquisition agreement		May 16, 2021
Reverse stock split ratio	15
Exchange ration of shares of common stock \| shares	0.3172
Issuance of common stock, Shares \| shares	5,776,660
Percentage of cumulative dividend on preferred stock	4.00%
Preferred stock value	$ 4,400
Merger Agreement [Member] \| Private Investment in Public Equity [Member]
Organization Consolidation And Presentations Of Financial Statements [Line Items]
Common stock, shares outstanding \| shares	20,800,000
Merger Agreement [Member] \| CVR Agreement [Member]
Organization Consolidation And Presentations Of Financial Statements [Line Items]
Percentage of proceeds plus reimbursement of expenses	10.00%
Merger Agreement [Member] \| Subscription Agreements [Member]
Organization Consolidation And Presentations Of Financial Statements [Line Items]
Date of acquisition agreement		May 16, 2021
Merger Agreement [Member] \| Subscription Agreements [Member] \| Private Investment in Public Equity [Member]
Organization Consolidation And Presentations Of Financial Statements [Line Items]
Issuance of common stock, Shares \| shares	11,852,862
Aggregate proceeds from issuance of common stock	$ 155,000
Aggregate net proceeds from issuance of common stock	$ 145,400
Merger Agreement [Member] \| Registration Rights Agreements [Member]
Organization Consolidation And Presentations Of Financial Statements [Line Items]
Date of acquisition agreement	Aug. 26, 2021

Related Party Transactions - Additional Information (Detail) - USD ($)		1 Months Ended	12 Months Ended
	Aug. 30, 2021	Jan. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2017	Dec. 31, 2016
Related Party Transaction [Line Items]
Related party transaction, amount paid				$ 1,404,000	$ 130,000
Payable to related party				258,000	14,314,000
Revenue				1,120,000	14,580,000
Celgene License Agreement [Member]
Related Party Transaction [Line Items]
Payments related to milestone				0	0
Payments related to royalties				0	0
Licensed drug manufacturing costs						$ 2,700,000	$ 1,200,000
Related party transaction, amount paid	$ 5,800,000			2,800,000
Related party transaction, percentage of outstanding payment obligation	50.00%
Payable to related party	$ 5,800,000			$ 200,000	2,800,000
Related party transaction, balloon payment interest rate per annum	4.00%
Payment received from license agreement		$ 14,000,000.0
Sublicense fees, percentage		20.00%		20.00%
License expense, related party				$ 200,000	$ 2,800,000
Revenue				$ 1,000,000.0
Celgene License Agreement [Member] \| Scenario Forecast [Member]
Related Party Transaction [Line Items]
Related party transaction, amount paid			$ 200,000

Summary of Significant Accounting Policies - Additional Information (Detail)		12 Months Ended
	Aug. 26, 2021 $ / shares shares	Dec. 31, 2021 USD ($) Segment $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares
Summary Of Significant Accounting Policies [Line Items]
Capital stock held \| shares	8,100,000
Common stock, shares outstanding \| shares	2,500,000	20,894,695	2,542,358
Common stock, shares authorized \| shares	300,000,000.0	300,000,000	20,000,000
Common stock, par value \| $ / shares	$ 0.0001	$ 0.0001	$ 0.0001
Reverse stock split, description		No fractional shares were issued in connection with the Reverse Stock Split.
Number of operating segment \| Segment		1
Cash and cash equivalents		$ 148,989,000	$ 4,455,000
Convertible promissory notes outstanding		0
Contract intangible asset value		3,900,000
Fair value, assets, transfers from Level 1 to Level 2		0	0
Fair value, assets, transfers from Level 2 to Level 1		0	0
Fair value, liabilities, transfers from Level 1 to Level 2		0	0
Fair value, liabilities, transfers from Level 2 to Level 1		0	0
Fair value, assets, transfers into Level 3		0	0
Fair value, assets, transfers out of Level 3		0	0
Fair value, liabilities, transfers into Level 3		0	0
Fair value, liabilities, transfers out of Level 3		0	0
Accounts receivable			14,149,000
Allowance for doubtful accounts		$ 0	0
Property and equipment estimated useful lives		5 years
Estimated useful life of intangible assets		14 years 3 months 18 days
Convertible promissory notes converted into common stock \| shares	698,018	698,018
Grant [Member]
Summary Of Significant Accounting Policies [Line Items]
Accounts receivable			100,000
EOC Pharma (Hong Kong) Limited [Member]
Summary Of Significant Accounting Policies [Line Items]
Accounts receivable			$ 14,000,000.0
Discount Rate [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated discount rate			25
Money Market Investments [Member]
Summary Of Significant Accounting Policies [Line Items]
Cash and cash equivalents		$ 140,000,000.0	$ 3,000,000.0

Summary of Significant Accounting Policies - Schedule of Assets and Liabilities Measured on Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Liabilities:
Convertible promissory notes		$ 10,131
Money Market Funds [Member]
Assets:
Money market funds	$ 140,032	3,041
Level 1 [Member] \| Money Market Funds [Member]
Assets:
Money market funds	$ 140,032	3,041
Level 3 [Member]
Liabilities:
Convertible promissory notes		$ 10,131

Summary of Significant Accounting Policies - Schedule of Assets and Liabilities Measured on Non-Recurring Basis (Detail)	Dec. 31, 2021 USD ($)
Assets:
Intangible asset	$ 3,900,000
Fair Value, Measurements, Nonrecurring [Member]
Assets:
Intangible asset	3,811
Fair Value, Measurements, Nonrecurring [Member] \| Level 3 [Member]
Assets:
Intangible asset	$ 3,811

Summary of Significant Accounting Policies - Reconciliation of Convertible Notes Measured at Fair Value Significant Unobservable Inputs (Detail) - Convertible Notes, Level 3 [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 10,131	$ 8,165
Issuance of convertible promissory notes		1,000
Accrued interest	584	813
Change in fair value of convertible promissory notes	(1,585)	153
Converted into common stock	$ (9,130)
Ending balance		$ 10,131

Summary of Significant Accounting Policies - Schedule of Outstanding Potentially Dilutive Securities Excluded in Calculation of Diluted Net Loss per Share (Detail) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Options to Purchase Common Stock [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total amount of anti-dilutive securities excluded from computation of earnings per share	1,750	391
Warrants to Purchase Common Stock [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total amount of anti-dilutive securities excluded from computation of earnings per share	37
Series Seed Convertible Preferred Stock [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total amount of anti-dilutive securities excluded from computation of earnings per share		734
Series A convertible preferred stock [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Total amount of anti-dilutive securities excluded from computation of earnings per share		7,212

Merger - Additional Information (Details) - Merger Agreement [Member]	Aug. 26, 2021 USD ($) shares
Business Acquisition [Line Items]
Estimated fair value consideration \| $	$ 110,388,558
Number of common stock issued under purchase consideration \| shares	3,208,718

Merger - Schedule of Estimated Fair Value Consideration (Detail) - Merger Agreement [Member]	Aug. 26, 2021 USD ($) $ / shares shares
Business Acquisition [Line Items]
Number of common stock issued under purchase consideration \| shares	3,208,718
Multiplied by the fair value per share of Aerpio common stock on August 26, 2021 \| $ / shares	$ 33.00
Fair value of Aerpio common stock	$ 105,887,694
Aadi transaction costs	4,500,864
Estimated fair value consideration	$ 110,388,558

Merger - Summary of Allocation of Purchase Price (Detail) - Merger Agreement [Member] $ in Thousands	Aug. 26, 2021 USD ($)
Business Acquisition [Line Items]
Cash and cash equivalents	$ 29,700
Other current assets	2,709
Intangible asset	78,062
Deposits	20
Accounts payable and accrued liabilities	(103)
Purchase price	$ 110,388

Merger - Summary of Allocation of Purchase Price (Parenthetical) (Detail)	Aug. 26, 2021
Merger Agreement [Member]
Business Acquisition [Line Items]
Percentage of proceeds with balance distributed to shareholders	10.00%

Intangible Asset - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
Impairment of acquired contract intangible asset	$ 74,156,000
Impairment of intangible assets, estimated fair value	$ 3,900,000
Percentage of future net cash proceeds will be remitted to CVR Holders	90.00%
Estimated useful life of intangible assets	14 years 3 months 18 days
Finite-Lived Intangible Assets, Net	$ 3,811,000	$ 0
Amortization expense	$ 95,000	$ 0

Intangible Asset - Summary of Estimated Amortization Expense Related to Definite Lived Intangible Asset (Detail) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
Intangible asset	$ 3,906,000
Less amortization	(95,000)
Intangible asset, net	3,811,000	$ 0
2022	273,000
2023	273,000
2024	273,000
2025	273,000
2026	273,000
Amounts thereafter	$ 2,446,000

Accrued Liabilities - Schedule of Accrued Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Accrued Liabilities Current [Abstract]
Accrued clinical	$ 2,507	$ 2,017
Accrued contract manufacturing	2,287	1,301
Accrued bonus	1,465	597
Accrued professional fees	1,948	11
Accrued other	238	173
Total accrued liabilities	$ 8,445	$ 4,099

Operating Lease - Additional Information (Detail) - Los Angeles, California [Member] - ft²	1 Months Ended
	Aug. 31, 2021	Apr. 30, 2019
Lessee Lease Description [Line Items]
Operating lease, agreement term		28 months
Area of office space on operating lease		2,760
Operating lease, commencement date		May 01, 2019
Operating lease, rent abatement period	9 months	4 months
Operating lease, expiration date	Feb. 28, 2025	Aug. 31, 2021
Operating lease, lease amendment term	3 years	3 years
Operating lease, extend the term for an additional period	3 years 6 months

Operating Lease - Summary of Information Related to Lease (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Assets:
Operating lease right-of-use assets	$ 557	$ 119
Liabilities:
Operating lease liabilities, current portion	131	125
Operating lease liabilities, net of current portion	474
Total operating lease liabilities	$ 605	$ 125

Operating Lease - Schedule of Rent Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Cash paid included in operating cash flows	$ 146	$ 195
Operating leases rent expense	$ 188	$ 183

Operating Lease - Summary of Future Minimum Lease Payments Required under Operating Lease (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Future Minimum Lease Payments:
2022	$ 169
2023	231
2024	238
2025	40
Total minimum lease payments	678
Less: amount representing interest	(73)
Total operating lease liabilities	605	$ 125
Less: operating lease liabilities, current	(131)	$ (125)
Operating lease liabilities, non-current	$ 474
Remaining lease term (in years)	3 years 2 months 1 day
Incremental borrowing rate	6.80%

EOC License Agreement - Additional Information (Detail) - USD ($) $ in Thousands		1 Months Ended	12 Months Ended
	Nov. 22, 2021	Jan. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Aug. 30, 2021
License Agreement [Line Items]
Right to terminate the agreement			120 days
Upfront payment		$ 14,000	$ 14,000
Revenue			1,120	$ 14,580
Amount of certain development, regulatory, and sales milestones payments eligible to receive under license agreement.			257,000
Milestone revenue	$ 1,000
Milestone payment received			1,000
Payable to related party			258	14,314
Celgene License Agreement [Member]
License Agreement [Line Items]
Revenue			$ 1,000
Sublicense fees, percentage		20.00%	20.00%
Payable to related party			$ 200	2,800	$ 5,800
License [Member]
License Agreement [Line Items]
Revenue			$ 1,000	$ 14,000

Convertible Notes - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended		12 Months Ended
	Aug. 26, 2021	Jan. 31, 2020	Oct. 31, 2019	Dec. 31, 2021	May 31, 2021
Debt Disclosure [Abstract]
Proceeds from issuance of convertible notes		$ 1.0	$ 8.1
Convertible notes interest rate for fourth month date of loan agreement		6.00%	6.00%	80.00%
Convertible notes interest rate for fifth and sixth month date of loan agreement		8.00%	8.00%
Convertible notes interest rate for remaining sixth months term until maturity at twelve months		10.00%	10.00%
Proceeds from issuance of preferred stock				$ 25.0
Convertible notes interest Rate in five or six months				75.00%
Convertible notes interest rate later than six months				70.00%
Outstanding principal percentage to be prepaid within four months				120.00%
Outstanding principal percentage to be prepaid within fifth and sixth months				130.00%
Outstanding principal percentage to be prepaid after sixth month but prior to maturity				140.00%
Term extension				Private Aadi entered into an amendment to the October 2019 and January 2020 Convertible Notes, whereby the term was extended from one year to two years
Conversion into common stock, fixed conversion price per share					$ 4.80
Conversion notes converted into common stock	698,018			698,018

Payroll Protection Program Loan - Additional Information (Detail) - Small Business Administration (SBA), CARES Act, Payroll Protection Program (PPP) Loan [Member] - USD ($)		1 Months Ended
	Apr. 29, 2021	May 31, 2020	Dec. 31, 2021
Payroll Protection Program Loan [Line Items]
Proceeds from approved loan		$ 200,000
Period after which debt instrument forgiven		168 days
Period for unforgiven debt payable		2 years
Debt instrument, interest rate for unforgiven debt		1.00%
Period for deferral payments of unforgiven debt		10 months
Minimum amount of debt, subject to review by government agency			$ 2,000,000
Accrued liability associated with risk of adverse review			$ 0
Principal Forgiveness [Member]
Payroll Protection Program Loan [Line Items]
Gain on debt forgiveness	$ 200,000

Common Stock - Additional Information (Detail) - USD ($)		12 Months Ended
	Aug. 26, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2017	Mar. 31, 2017	Feb. 28, 2017	Feb. 23, 2017	Dec. 31, 2015
Class Of Stock [Line Items]
Preferred stock, shares authorized		10,000,000
Preferred stock, par value		$ 0.0001
Preferred stock, shares outstanding		0
Common stock, shares authorized	300,000,000.0	300,000,000	20,000,000
Common stock, par value	$ 0.0001	$ 0.0001	$ 0.0001
Common stock, shares outstanding	2,500,000	20,894,695	2,542,358
Issuance of common stock, Shares	2,558,218
Proceeds from the issuance of common stock to PIPE Investors		$ 155,000,000
Aggregate net proceeds from issuance of common stock		145,400,000
Dividends common stock declared or paid		$ 0
Merger Agreement [Member]
Class Of Stock [Line Items]
Percentage of cumulative dividend on preferred stock	4.00%
Preferred stock cumulative dividend	$ 4,400,000
Issuance of common stock, Shares	5,776,660
Private Investment in Public Equity [Member] \| Merger Agreement [Member]
Class Of Stock [Line Items]
Common stock, shares outstanding	20,800,000
Private Investment in Public Equity [Member] \| Merger Agreement [Member] \| Subscription Agreements [Member]
Class Of Stock [Line Items]
Issuance of common stock, Shares	11,852,862
Proceeds from the issuance of common stock to PIPE Investors	$ 155,000,000.0
Aggregate net proceeds from issuance of common stock	$ 145,400,000
Series Seed Preferred Stock [Member]
Class Of Stock [Line Items]
Preferred stock, shares authorized		0	734,218
Preferred stock, par value		$ 0.0001	$ 0.0001
Preferred stock, shares outstanding		0	734,218
Number of shares converted							734,218
Preferred stock, shares issued		0	734,218
Series A Preferred Stock [Member]
Class Of Stock [Line Items]
Preferred stock, shares authorized		0	7,211,948
Preferred stock, par value		$ 0.0001	$ 0.0001
Preferred stock, shares outstanding		0	7,211,948
Number of shares converted				881,286				482,426
Preferred stock, shares issued		0	7,211,948
Preferred stock, issued price								$ 3.42
Convertible preferred stock, shares issued upon conversion percentage								85.00%
Series A Preferred Stock [Member] \| Private Investment in Public Equity [Member]
Class Of Stock [Line Items]
Preferred stock, shares issued					5,847,940	5,847,940
Preferred stock, issued price					$ 3.42	$ 3.42

Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended	12 Months Ended
	Aug. 26, 2021	Feb. 28, 2017	Dec. 31, 2021	Dec. 31, 2020	Jan. 01, 2022	Oct. 14, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options or similar awards granted, assumed through merger			248,258
Shares outstanding			1,749,876	390,949
Aggregate intrinsic value, outstanding			$ 10,007	$ 505
Expense related to the acceleration of vesting associated with individual awards			$ 300
Weighted-average fair value of options granted			$ 18.88	$ 2.56
Expected dividend yield			0.00%
Warrants outstanding			36,666	0
Number of warrants issued to purchase common stock						40,000
Warrants exercise price per share						$ 7.29
Warrants expiration date			Oct. 24, 2024
Private Aadi Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock shares available for issuance			0
Vesting period		4 years
Shares outstanding			432,978
Private Aadi Plan [Member] \| Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Term of options granted		10 years
2011 Plan and 2017 Plan [Member] \| Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options or similar awards granted, assumed through merger			0
2021 Equity Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock shares available for issuance	2,070,784		1,390,606
Percentage applied to the outstanding shares as annual increase in number of shares authorized for issuance	4.00%
Shares outstanding			1,190,631
Aggregate intrinsic value, outstanding			$ 10,000
Unrecognized compensation cost related to stock options			$ 22,100
Weighted average period expected to be recognized			2 years 10 months 24 days
2021 Equity Incentive Plan [Member] \| Subsequent Event [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock shares available for issuance					835,787
2021 Equity Incentive Plan [Member] \| Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options or similar awards granted, assumed through merger	764,154
Aerpio 2011 Equity Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares outstanding			0
Aerpio 2017 Stock Option and Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares outstanding			126,267

Stock-Based Compensation - Summary of Stock Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Shares, Outstanding at beginning balance	390,949
Shares, Granted	1,248,520
Shares, Assumed through Merger	248,258
Shares, Exercised	(72,316)
Shares, Expired/cancelled	(65,535)
Shares, Outstanding at ending balance	1,749,876	390,949
Shares, Vested and exercisable	444,700
Shares, Vested and expected to vest	1,749,876
Weighted Average Exercise Price, Outstanding at beginning balance	$ 2.11
Weighted Average Exercise Price, Granted	26.05
Weighted Average Exercise Price, Assumed through Merger	29.20
Weighted Average Exercise Price, Exercised	11.52
Weighted Average Exercise Price, Expired/cancelled	53.99
Weighted Average Exercise Price, Outstanding at ending balance	20.71	$ 2.11
Weighted Average Exercise Price, Vested and exercisable	8.63
Weighted Average Exercise Price, Vested and expected to vest	$ 20.71
Weighted Average Remaining Contractual Term, Outstanding	8 years 5 months 23 days	7 years 3 months 3 days
Weighted Average Remaining Contractual Term, Vested and exercisable	5 years 18 days
Weighted Average Remaining Contractual Term, Vested and expected to vest	8 years 5 months 23 days
Aggregate Intrinsic Value, Outstanding	$ 10,007	$ 505
Aggregate Intrinsic Value, Vested and exercisable	7,585
Aggregate Intrinsic Value, Vested and expected to vest	$ 10,007

Stock-Based Compensation - Summary of Recognized Compensation Cost Related to Employee and Non-employee Stock-Based Compensation Activity (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	$ 2,106	$ 139
Research and development [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	657	94
General and administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	$ 1,449	$ 45

Stock-Based Compensation - Stock Options Valuation Assumptions (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average fair value of options granted	$ 18.88	$ 2.56
Risk-free interest rate, Minimum	0.84%	0.34%
Risk-free interest rate, Maximum	1.38%	0.80%
Expected volatility, Minimum	85.21%	89.57%
Expected volatility, Maximum	87.88%	92.52%
Expected dividend yield	0.00%
Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (in years)	5 years 1 month 6 days	5 years 3 months 18 days
Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (in years)	6 years 3 months 18 days	6 years 3 months 18 days

Employee Stock Purchase Plan - Additional Information (Detail) - Employee Stock Purchase Plan [Member] - shares		12 Months Ended
	Aug. 17, 2021	Dec. 31, 2021	Jan. 01, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares issued		0
Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock shares available for issuance	310,617
Maximum number of shares provided for issuance	310,617
Percentage of annual increase in number of shares reserved for issuance	1.00%
Subsequent Event [Member] \| Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock shares available for issuance			208,946

Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Line Items]
Current income tax expense or benefit	$ 0	$ 0
Deferred income tax expense or benefit	0	0
Increase in valuation allowance	28,200,000	$ 1,600,000
Penalties related to income tax matters	0
Accrued interest related to income tax matters	$ 0
Net operating loss, carryback period due to CARES Act	5 years
Federal [Member]
Income Tax Disclosure [Line Items]
Operating loss carryforwards	$ 150,900,000
Operating loss carryforwards, expiration date	Dec. 31, 2030
Operating loss carryforwards, carried forward indefinitely	$ 106,600,000
State [Member]
Income Tax Disclosure [Line Items]
Operating loss carryforwards	$ 55,800,000
Operating loss carryforwards, expiration date	Dec. 31, 2030
Research and Development [Member] \| Federal [Member]
Income Tax Disclosure [Line Items]
Tax credit carryforwards	$ 3,100,000
Tax credit carryforwards, expiration date	Dec. 31, 2037
Research and Development [Member] \| State [Member]
Income Tax Disclosure [Line Items]
Tax credit carryforwards	$ 1,700,000
Tax credit carryforwards, expiration date	Dec. 31, 2027

Income Taxes - Schedule of Reconciliation of Statutory Federal Income Tax (Detail)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Federal tax at statutory rate	21.00%	21.00%
State income tax, net of federal benefit	0.50%	2.50%
Nondeductible interest	(0.10%)	(4.90%)
Other permanent items	0.40%	(1.60%)
Nondeductible impairment	(13.80%)
Research credit	0.90%	28.80%
Change in valuation allowance	(8.90%)	(45.70%)
Effective tax rate		0.10%

Income Taxes - Schedule of Significant Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Net operating loss carryforwards	$ 34,228	$ 7,265
Research and development tax credits	3,732	2,782
Other	1,214	227
Total deferred tax assets	39,174	10,274
Valuation allowance	(38,410)	(10,255)
Total gross deferred tax assets, net of valuation allowance	764	19
Deferred tax liabilities:
Other	(764)	(19)
Total gross deferred tax liabilities	$ (764)	$ (19)

Income Taxes - Summary of Changes to Gross Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Balance at the beginning of the year	$ 2,404	$ 2,210
Decrease related to prior year positions	(24)
Increase related to current year positions	294	194
Balance at the end of the year	$ 2,674	$ 2,404

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Commitments And Contingencies Disclosure [Abstract]
Accrued clinical and contract manufacturing expense	$ 4.8	$ 3.3

Subsequent Events - Additional Information (Detail)	Jan. 13, 2022
Subsequent Event [Member] \| Fresenius Agreement [Member]
Subsequent Event [Line Items]
Negotiated purchase order effective date of agreement	Dec. 22, 2022