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Note 7 - Stockholders' Equity (Deficit) (Details Textual)
3 Months Ended 6 Months Ended
Jun. 27, 2016
$ / shares
shares
Apr. 15, 2016
$ / shares
shares
Feb. 12, 2016
USD ($)
$ / shares
shares
Jun. 30, 2016
USD ($)
$ / shares
shares
Mar. 31, 2016
USD ($)
Jun. 30, 2016
USD ($)
$ / shares
shares
Jun. 26, 2016
$ / shares
shares
Dec. 31, 2015
$ / shares
shares
Reverse Stock Split [Member]                
Stockholders' Equity Note, Stock Split, Conversion Ratio 15,463.7183              
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        
The 2006 Plan [Member] | Employee Stock Option [Member] | Chief Financial Officer [Member]                
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     3 years          
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period     10 years          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting, Number of Monthly Installments     35          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting, Monthly Installment, Shares     0.18          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting, Final Monthly Installment, Shares     2,778          
Allocated Share-based Compensation Expense | $         $ 5,192 $ 10,220    
The 2006 Plan [Member] | Employee Stock Option [Member]                
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized       2,000,000   2,000,000    
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period       10 years        
The 2006 Plan [Member] | Chief Financial Officer [Member]                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross     100,000          
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price | $ / shares     $ 1.25          
The 2006 Plan [Member]                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number       2,592,229   2,592,229    
Employee Stock Option [Member] | Minimum [Member] | Employees and Consultants [Member]                
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period   10 years            
Employee Stock Option [Member] | Maximum [Member] | Employees and Consultants [Member]                
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period   1 year            
Employee Stock Option [Member] | Each Member of Board of Directors [Member]                
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period   2 years            
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period   10 years            
Employee Stock Option [Member] | Employees and Consultants [Member]                
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period   4 years            
Employee Stock Option [Member] | Former Executives [Member]                
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period       3 years        
Employee Stock Option [Member]                
Allocated Share-based Compensation Expense | $       $ 176,892        
Each Member of Board of Directors [Member]                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross   40,000            
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price | $ / shares   $ 1.25            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Additional   5,000            
Director [Member]                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross   175,000            
Employees and Consultants [Member]                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross   1,008,299            
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price | $ / shares   $ 1.25            
Former Executives [Member]                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross       17,785        
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price | $ / 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          
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          
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]                
Business Combination, Stock Warrant Conversion Ratio     1          
Debt Instrument, Face Amount | $     $ 665,000          
Debt Instrument, Increase, Accrued Interest | $     $ 35,000          
Class of Warrant or Right, Expiration Period     5 years          
Private Placement [Member] | Placement Agent Warrants [Member] | Series B Preferred Stock [Member]                
Class of Warrant or Right, Number of Securities Called by Warrants or Rights   127,346            
Private Placement [Member] | Placement Agent Warrants [Member]                
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares   $ 1.25            
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          
Predecessor Warrants [Member] | Series B Preferred Stock [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          
Series B Preferred Stock [Member]                
Preferred Stock, Shares Authorized       18,000,000   18,000,000   18,000,000
Stock Conversion from Series B Preferred Stock to Common Stock [Member]                
Convertible Preferred Stock, Shares Issued upon Conversion 1              
Common Stock, Shares Authorized 100,000,000     100,000,000   100,000,000 100,000,000,000 100,000,000
Common Stock, Par or Stated Value Per Share | $ / shares $ 0.0001   $ 0.0001 $ 0.0001   $ 0.0001 $ 0.000001 $ 0.0001
Preferred Stock, Shares Authorized 20,000,000           5,000,000,000  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number       2,592,229   2,592,229   1,707,744
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross           1,301,084    
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price | $ / shares       $ 1.25   $ 1.25    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares           133,229