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Note 6 - Stockholders' Equity (Details Textual)		3 Months Ended
	Feb. 12, 2016 USD ($) $ / shares shares	Mar. 31, 2017 USD ($) $ / shares shares	Mar. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2016 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value | $		$ 166,250		$ 171,537
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross		150,000	161,582
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price | $ / shares		$ 1.25	$ 1.25
Class of Warrant or Right, Outstanding		3,726,658		3,826,658
Class of Warrant or Right, Outstanding, Weighted Average Exercise Price | $ / shares		$ 1.05		$ 1.02
Class of Warrant or Right Outstanding, Aggregate Intrinsic Value | $		$ 763,342
Private Placement [Member] | Series B Preferred Stock [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	423,291
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares	$ 1.25
Class of Warrant or Right, Expiration Period	5 years
Protagenic Therapeutics Inc [Member]
Business Combination, Stock Warrant Conversion Ratio	1
Debt Instrument, Face Amount | $	$ 665,000
Debt Instrument, Increase, Accrued Interest | $	$ 35,000
Protagenic Therapeutics Inc [Member] | Predecessor Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	295,945
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares	$ 1.25
Class of Warrant or Right, Expiration Period	5 years
Protagenic Therapeutics Inc [Member] | Placement Agent Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	127,346
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares	$ 1.25
Protagenic Therapeutics Inc [Member] | Private Placement [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	3,403,367
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares	$ 1.05
Employee Stock Option [Member]
Allocated Share-based Compensation Expense | $		$ 355,336	$ 102,908
The 2006 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number		2,613,299		2,484,445
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross		150,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price | $ / shares		$ 1.25
The 2006 Plan [Member] | Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized		2,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period		10 years
The 2006 Plan [Member] | Employee Stock Option [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		1 year
The 2006 Plan [Member] | Employee Stock Option [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		5 years

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