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Note 6 - Stockholders' Deficit (Details Textual) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Apr. 01, 2012
Jun. 30, 2016
Jun. 30, 2016
Dec. 31, 2015
Dec. 31, 2014
Feb. 18, 2023
May 19, 2021
Jun. 27, 2016
Jun. 26, 2016
Feb. 12, 2016
Oct. 02, 2015
Oct. 01, 2015
Dec. 31, 2013
Mar. 15, 2006
Common Stock [Member]                            
Stock Issued During Period, Shares, New Issues     0 0                  
The 2006 Plan [Member] | Employee Stock Option [Member] | Minimum [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 1 year 1 year   180 days                    
The 2006 Plan [Member] | Employee Stock Option [Member] | Maximum [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 5 years     5 years                    
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 2,000,000                     140,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period   5 years                        
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period   10 years   10 years                    
The 2006 Plan [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period       0 0                  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value       $ 0                    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross       490,000 240,000                  
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price       $ 1.25 $ 1                  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number   2,592,229 2,592,229 292,256 782,256                  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options       $ 290,985                    
Employee Stock Option [Member]                            
Allocated Share-based Compensation Expense   $ 176,892   $ 190,751 $ 85,168                  
Warrant [Member]                            
Common Stock, Par or Stated Value Per Share       $ 0.001                    
Allocated Share-based Compensation Expense       $ 287,878 $ 0                  
Shares Issued, Price Per Share       $ 1                    
Major Stockholder and Chairman [Member] | Scenario, Forecast [Member]                            
Class of Warrant or Right, Number of Securities Called by Warrants or Rights           317,789 100,000              
Major Stockholder and Chairman [Member]                            
Class of Warrant or Right, Exercise Price of Warrants or Rights       $ 1                    
Class of Warrant or Right, Exercise Period       10 years                    
Class of Warrant or Right, Issued       1,253,367                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights       417,789                    
Common Stock, Par or Stated Value Per Share   $ 0.0001 $ 0.0001 $ 0.0001 $ 0.001     $ 0.0001 $ 0.000001 $ 0.0001 $ 0.001      
Common Stock, Shares Authorized   100,000,000 100,000,000 20,000,000 20,000,000     100,000,000 100,000,000,000   20,000,000 10,000,000    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross     1,301,084 490,000 240,000                  
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price   $ 1.25 $ 1.25 $ 1.25 $ 1                  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number   2,592,229 2,592,229 1,707,744 1,217,744               977,744  
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right       3                    
Class of Warrant or Right, Exercise Price of Warrants or Rights       $ 1                    
Class of Warrant or Right, Exercise Period       10 years