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Document and Entity Information - USD ($)	12 Months Ended
Document and Entity Information - USD ($)	Dec. 31, 2016	Mar. 07, 2017
Document and Entity Information [Abstract]
Entity Registrant Name	ZETA ACQUISITION CORP II
Entity Central Index Key	0001422142
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Type	10-K
Document Period End Date	Dec. 31, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	FY
Entity Well-known Seasoned Issuer	No
Entity Filer Category	Smaller Reporting Company
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Common Stock, Shares Outstanding		5,000,000
Entity Public Float	$ 0

Balance Sheets - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 4,012	$ 18,529
Total assets	4,012	18,529
Current liabilities:
Accounts payable	4,274	3,674
Accrued interest	42,378	32,436
Accrued expenses	13,275	8,900
Notes payable, stockholders	170,000	160,000
Total liabilities	229,927	205,010
Stockholders' deficit
Preferred stock, $0.0001 par value; 10,000,000 shares authorized; no shares issued and outstanding
Common stock, $0.0001 par value; 100,000,000 shares authorized; 5,000,000 shares issued and outstanding	500	500
Additional paid-in capital	49,500	49,500
Accumulated deficit	(275,915)	(236,481)
Total stockholders' deficit	(225,915)	(186,481)
Total liabilities and stockholders' deficit	$ 4,012	$ 18,529

Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2016	Dec. 31, 2015
Condensed Balance Sheets [Abstract]
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	5,000,000	5,000,000
Common stock, shares outstanding	5,000,000	5,000,000

Statements of Operations - USD ($)	12 Months Ended
Statements of Operations - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Operating expenses:
General and administrative	$ 29,492	$ 23,006
Operating loss	(29,492)	(23,006)
Interest expense	9,942	8,434
Net loss	$ (39,434)	$ (31,440)
Net loss per basic and diluted common share	$ (0.01)	$ (0.01)
Weighted-average number of common shares outstanding	5,000,000	5,000,000

Statements of Stockholders' Deficit - USD ($)	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit
Balance at Dec. 31, 2014	$ (155,041)	$ 500	$ 49,500	$ (205,041)
Balance, Shares at Dec. 31, 2014		5,000,000
Net loss	(31,440)			(31,440)
Balance at Dec. 31, 2015	(186,481)	$ 500	49,500	(236,481)
Balance, Shares at Dec. 31, 2015		5,000,000
Net loss	(39,434)			(39,434)
Balance at Dec. 31, 2016	$ (225,915)	$ 500	$ 49,500	$ (275,915)
Balance, Shares at Dec. 31, 2016		5,000,000

Statements of Cash Flows - USD ($)	12 Months Ended
Statements of Cash Flows - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Operating activities
Net loss	$ (39,434)	$ (31,440)
Adjustments to reconcile net loss to net cash
Used in operating activities:
Increase in accounts payable	600	1,272
Increase in accrued interest	9,942	8,434
Increase in accrued expenses	4,375
Net cash used in operating activities	(24,517)	(21,734)
Financing activities
Proceeds from notes payable, stockholders	10,000	35,000
Net cash provided by financing activities	10,000	35,000
Net increase (decrease) in cash and cash equivalents	(14,517)	13,266
Cash and cash equivalents at beginning of period	18,529	5,263
Cash and cash equivalents at end of period	$ 4,012	$ 18,529

Nature of Operations and Significant Accounting Policies

12 Months Ended

Dec. 31, 2016

Nature of Operations and Significant Accounting Policies [Abstract]

Nature of Operations and Significant Accounting Policies

1.	Nature of Operations and Significant Accounting Policies

Nature of Operations

Zeta Acquisition Corp. II (the "Company") was incorporated under the laws of the State of Delaware on November 16, 2007. The Company was organized as a vehicle to investigate and, if such investigation warrants, acquire a target company or business seeking the perceived advantages of being a publicly held corporation. The Company's principal business objective for the next twelve (12) months and beyond will be to achieve long-term growth potential through a combination with a business. The Company will not restrict its potential candidate target companies to any specific business, industry or geographical location and, thus, may acquire any type of business.

Liquidity

Since its inception, the Company has generated no revenues and has incurred a net loss of $275,915. Since inception, the Company has been dependent upon the receipt of capital investment or other financing to fund its continuing activities. In addition, the Company is dependent upon certain related parties to provide continued funding and capital resources but it is uncertain whether this funding will continue. The accompanying financial statements have been presented on the basis of the continuation of the Company as a going concern and do not include any adjustments relating to the recoverability and classification of recorded asset amounts or the amounts and classification of liabilities that might be necessary should the Company be unable to continue as a going concern.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting periods. Actual results could differ from those estimates.

Cash and Cash Equivalents

For purposes of the statement of cash flows, the Company considers all highly liquid investments with a maturity of three (3) months or less to be cash equivalents.

Income Taxes

The Company accounts for income taxes in accordance with ASC Topic 740, Income Taxes, which requires the recognition of deferred tax liabilities and assets at currently enacted tax rates for the expected future tax consequences of events that have been included in the financial statements or tax returns. A valuation allowance is recognized to reduce the net deferred tax asset to an amount that is more likely than not to be realized.

Fair Value of Financial Instruments

Pursuant to ASC Topic 820-10, Fair Value Measurements and Disclosures, the Company is required to estimate the fair value of all financial instruments included on its balance sheet as of December 31, 2016 and 2015. The Company considers the carrying value of cash and cash equivalents, accounts payable, accrued expenses, accrued interest, and notes payable to stockholders to approximate fair value due to their short maturities.

Net Loss Per Share

Basic loss per share is computed by dividing net loss by the weighted-average number of common shares outstanding for the period. The Company currently has no dilutive securities and as such, basic and diluted loss per share are the same for all periods presented.

Recently Issued Accounting Pronouncements

On January 1, 2015, the Company adopted Financial Accounting Standards Board, (“FASB”), Accounting Standards Update, (“ASU”), No. 2014-10, which eliminates the concept of a development stage entity, (“DSE”), in its entirety from United States Generally Accepted Accounting Principles, (“U.S. GAAP”). In accordance with ASU No. 2014-10, the Company has removed labeling the financial statements as a DSE and has eliminated inception-to-date information in the financial statements.

In August 2014, the FASB issued ASU 2014-15, Presentation of Financial Statements - Going Concern (Subtopic 205-40) "Disclosure of Uncertainties about an Entity's Ability to Continue as a Going Concern." The objective of the guidance is to require management to explicitly assess an entity's ability to continue as a going concern, and to provide related footnote disclosures in certain circumstances. In connection with each annual and interim period, management will assess if there is substantial doubt about an entity's ability to continue as a going concern within one year after the issuance date of an entity's financial statements. The new standard defines substantial doubt and provides examples of indicators thereof. The definition of substantial doubt incorporates a likelihood threshold of "probable" similar to the current use of that term in U.S. GAAP for loss contingencies. The new standard will be effective for all entities in the first annual period ending after December 15, 2015. Earlier application is permitted. The Company has adopted this standard.

Income Taxes

12 Months Ended

Dec. 31, 2016

Income Taxes [Abstract]

Income Taxes

5.	Income Taxes

The Company has reviewed its tax positions as of December 31, 2016 and 2015, and has not identified any positions that are uncertain. Income tax returns filed and to be filed for the years ended December 31, 2014, 2015, and 2016 are open to review by the Internal Revenue Service.

The tax effects of temporary differences that give rise to significant portions of the Company's net deferred tax asset at December 31, 2016 and 2015 are as follows:

	December 31,			December 31,
	2016			2015
Deferred tax asset:
Capitalized formation costs	$	79,400		$	69,400
Net operating loss carryforward		14,400			11,000
Valuation allowance		(93,800	)		(80,400	)
Net deferred tax asset recognized	$	--		$	--

A full valuation allowance has been recorded against the Company's deferred tax asset because, based on the weight of available evidence, it is more likely than not that such benefits will not be realized. As of December 31, 2016, the Company has a net operating loss carryforward for federal and state income tax purposes of approximately $42,400. The net operating loss carryforward will begin to expire in 2029.

The benefit from income taxes differs from the amount computed by applying the United States (US) federal income tax rate of thirty-four percent (34%) in 2016 and 2015 to loss before income taxes for the years ended December 31, 2016 and 2015 as follows:

	Year Ended			Year Ended
	December 31,			December 31,
	2016			2015

US federal income tax benefit at statutory rate	$	(13,400	)	$	(10,700	)
Other		--			100
Change in valuation allowance		13,400			10,600
Benefit from income taxes	$	--		$	--

Nature of Operations and Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2016
Nature of Operations and Significant Accounting Policies [Abstract]
Liquidity	Liquidity Since its inception, the Company has generated no revenues and has incurred a net loss of $275,915. Since inception, the Company has been dependent upon the receipt of capital investment or other financing to fund its continuing activities. In addition, the Company is dependent upon certain related parties to provide continued funding and capital resources but it is uncertain whether this funding will continue. The accompanying financial statements have been presented on the basis of the continuation of the Company as a going concern and do not include any adjustments relating to the recoverability and classification of recorded asset amounts or the amounts and classification of liabilities that might be necessary should the Company be unable to continue as a going concern.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting periods. Actual results could differ from those estimates.
Cash and Cash Equivalents	Cash and Cash Equivalents For purposes of the statement of cash flows, the Company considers all highly liquid investments with a maturity of three (3) months or less to be cash equivalents.
Income Taxes	Income Taxes The Company accounts for income taxes in accordance with ASC Topic 740, Income Taxes, which requires the recognition of deferred tax liabilities and assets at currently enacted tax rates for the expected future tax consequences of events that have been included in the financial statements or tax returns. A valuation allowance is recognized to reduce the net deferred tax asset to an amount that is more likely than not to be realized.
Fair Value of Financial Instruments	Fair Value of Financial Instruments Pursuant to ASC Topic 820-10, Fair Value Measurements and Disclosures, the Company is required to estimate the fair value of all financial instruments included on its balance sheet as of December 31, 2016 and 2015. The Company considers the carrying value of cash and cash equivalents, accounts payable, accrued expenses, accrued interest, and notes payable to stockholders to approximate fair value due to their short maturities.
Net Loss Per Share	Net Loss Per Share Basic loss per share is computed by dividing net loss by the weighted-average number of common shares outstanding for the period. The Company currently has no dilutive securities and as such, basic and diluted loss per share are the same for all periods presented.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements On January 1, 2015, the Company adopted Financial Accounting Standards Board, (“FASB”), Accounting Standards Update, (“ASU”), No. 2014-10, which eliminates the concept of a development stage entity, (“DSE”), in its entirety from United States Generally Accepted Accounting Principles, (“U.S. GAAP”). In accordance with ASU No. 2014-10, the Company has removed labeling the financial statements as a DSE and has eliminated inception-to-date information in the financial statements. In August 2014, the FASB issued ASU 2014-15, Presentation of Financial Statements - Going Concern (Subtopic 205-40) "Disclosure of Uncertainties about an Entity's Ability to Continue as a Going Concern." The objective of the guidance is to require management to explicitly assess an entity's ability to continue as a going concern, and to provide related footnote disclosures in certain circumstances. In connection with each annual and interim period, management will assess if there is substantial doubt about an entity's ability to continue as a going concern within one year after the issuance date of an entity's financial statements. The new standard defines substantial doubt and provides examples of indicators thereof. The definition of substantial doubt incorporates a likelihood threshold of "probable" similar to the current use of that term in U.S. GAAP for loss contingencies. The new standard will be effective for all entities in the first annual period ending after December 15, 2015. Earlier application is permitted. The Company has adopted this standard.

- Definition

Disclosure of accounting policy for cash and cash equivalents, including the policy for determining which items are treated as cash equivalents. Other information that may be disclosed includes (1) the nature of any restrictions on the entity's use of its cash and cash equivalents, (2) whether the entity's cash and cash equivalents are insured or expose the entity to credit risk, (3) the classification of any negative balance accounts (overdrafts), and (4) the carrying basis of cash equivalents (for example, at cost) and whether the carrying amount of cash equivalents approximates fair value.

+ References + Details

- Definition

Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements.

+ References + Details

Notes Payable, Stockholders (Details) - USD ($)	12 Months Ended
Notes Payable, Stockholders (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2010	Dec. 31, 2009
Notes Payable, Stockholders (Textual)
Proceeds from issuance of unsecured promissory note	$ 10,000	$ 35,000	$ 15,000	$ 25,000	$ 25,000	$ 35,000	$ 25,000
Interest rate on unsecured promissory note	6.00%
Accrued interest on unsecured promissory note	$ 42,378	$ 32,436

Common Stock (Details) - USD ($)	1 Months Ended
Common Stock (Details) - USD ($)	Dec. 31, 2007	Dec. 31, 2016	Dec. 31, 2015
Common Stock (Textual)
Common stock, shares authorized		100,000,000	100,000,000
Common Stock [Member]
Common Stock (Textual)
Common stock issued to private placement	5,000,000
Proceeds from issuance of common stock	$ 50,000

Income Taxes (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Deferred tax asset:
Capitalized formation costs	$ 79,400	$ 69,400
Net operating loss carryforward	14,400	11,000
Valuation allowance	(93,800)	(80,400)
Net deferred tax assets recognized

Income Taxes (Details 1) - USD ($)	12 Months Ended
Income Taxes (Details 1) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Income Taxes [Abstract]
US federal income tax benefit at statutory rate	$ (13,400)	$ (10,700)
Other		100
Change in valuation allowance	13,400	10,600
Benefit from income taxes

Nature of Operations and Significant Accounting Policies (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Nature of Operations and Significant Accounting Policies (Textual)
Deficit accumulated since inception	$ (275,915)	$ (236,481)

Income Taxes (Details Textual) - USD ($)	12 Months Ended
Income Taxes (Details Textual) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Income Taxes (Textual)
Operating loss carryforwards	$ 42,400
Operating loss carryforwards, expiration date	Dec. 31, 2029
Effective federal statutory income tax rate, percent	34.00%	34.00%

Preferred Stock (Details) - shares	Dec. 31, 2016	Dec. 31, 2015
Preferred Stock (Textual)
Preferred stock, shares authorized	10,000,000	10,000,000