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Note 11 - Subsequent Events (Details Textual) |  |  |  |  |  |  | 2 Months Ended | 9 Months Ended |
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Jul. 27, 2016 $ / shares | Jun. 27, 2016 | Apr. 16, 2016 USD ($) $ / shares shares | Apr. 15, 2016 USD ($) shares | Mar. 02, 2016 USD ($) shares | Feb. 12, 2016 USD ($) $ / shares shares | Apr. 15, 2016 USD ($) shares | Sep. 30, 2016 USD ($) $ / shares | Sep. 30, 2015 USD ($) | Dec. 31, 2015 $ / shares
Preferred Stock, Par or Stated Value Per Share | $ / shares | $ 0.000001 |  |  |  |  |  |  | $ 0.000001 |  | $ 0.000001
Stock Issued During Period, Value, New Issues |  |  |  |  |  |  |  | $ 4,761,797 |  |
Stock Issued During Period, Value, Conversion of Convertible Securities |  |  |  |  |  |  |  | 75,265 |  |
Conversion of Outstanding Stockholder Debt [Member] | Predecessor's Stockholder [Member] |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Value, Conversion of Convertible Securities |  |  |  |  |  | $ 150,000 |  |  |  |
Conversion of Outstanding Stockholder Debt [Member] | Chairman and Board Member Garo H. Armen [Member] |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Value, Conversion of Convertible Securities |  |  |  |  |  | $ 350,000 |  |  |  |
Private Placement [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Private Placement |  |  | $ 4,635,575 |  |  |  |  |  |  |
Proceeds From Issuance of Private Placement, Net of Issuance Costs |  |  | 4,283,438 |  |  |  |  |  |  |
Private Placement Offering [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Value, Conversion of Convertible Securities |  |  | 500,000 |  |  |  |  |  |  |
Proceeds from Issuance of Private Placement |  |  | 5,135,575 |  |  |  |  |  |  |
Proceeds From Issuance of Private Placement, Net of Issuance Costs |  |  | 4,783,438 |  |  |  |  |  |  |
Placement Agent Warrants [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |
Payments for Commissions |  |  | 159,183 |  |  |  |  |  |  |
Cost and Expense Allowance |  |  | $ 15,000 |  |  |  |  |  |  |
Reverse Stock Split [Member] |  |  |  |  |  |  |  |  |  |
Stockholders' Equity Note, Stock Split, Conversion Ratio |  | 15,463.7183 |  |  |  |  |  |  |  |
Series B Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Value, Conversion of Convertible Securities |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Convertible Preferred Stock |  |  |  |  |  |  |  | $ 4,283,437 |  |
Series B Preferred Stock [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Private Placement |  |  |  | $ 525,325 |  |  |  |  |  |
Series B Preferred Stock [Member] | Private Placement [Member] |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues | shares |  |  |  | 420,260 | 913,200 | 2,775,000 | 4,108,460 |  |  |
Shares Issued, Price Per Share | $ / shares |  |  |  |  |  | $ 1.25 |  |  |  |
Stock Issued During Period, Value, New Issues |  |  |  |  |  | $ 3,468,750 |  |  |  |
Proceeds from Issuance of Convertible Preferred Stock |  |  |  | $ 525,325 | $ 1,141,500 |  |  |  |  |
Proceeds from Issuance of Private Placement |  |  |  |  |  |  | $ 4,635,575 |  |  |
Proceeds From Issuance of Private Placement, Net of Issuance Costs |  |  |  |  |  |  | $ 4,283,438 |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares |  |  |  |  |  | 423,291 |  |  |  |
Series B Preferred Stock [Member] | Private Placement [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues | shares |  |  |  | 420,260 |  |  |  |  |  |
Series B Preferred Stock [Member] | Private Placement Offering [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues | shares |  |  | 4,108,460 |  |  |  |  |  |  |
Series B Preferred Stock [Member] | Placement Agent Warrants [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |
Preferred Stock, Par or Stated Value Per Share | $ / shares |  |  | $ 1.25 |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares |  |  | 127,346 |  |  |  |  |  |  |
Series B Preferred Stock [Member] | Reverse Stock Split [Member] |  |  |  |  |  |  |  |  |  |
Stockholders' Equity Note, Stock Split, Conversion Ratio | 15,463.7183 |  |  |  |  | 15,463.7183 |  |  |  |
Protagenic Therapeutics Inc [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition, Conversion of Stock, Ratio |  |  |  |  |  | 1 |  |  |  |
Business Combination, Stock Warrant Conversion Ratio |  |  |  |  |  | 1 |  |  |  |
Protagenic Therapeutics Inc [Member] | Private Placement [Member] |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares |  |  |  |  |  | 3,403,367 |  |  |  |
Protagenic Therapeutics Inc [Member] | Series B Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |
Preferred Stock, Par or Stated Value Per Share | $ / shares |  |  |  |  |  | $ 0.000001 |  |  |  |

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