Quarterly report pursuant to Section 13 or 15(d)

Note 8 - Summary of Stock Options (Details Textual)

v3.7.0.1
Note 8 - Summary of Stock Options (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 7 Months Ended 12 Months Ended
Dec. 23, 2016
Aug. 22, 2016
Jan. 31, 2017
Nov. 30, 2016
Sep. 30, 2016
Aug. 31, 2016
Jan. 31, 2016
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2017
Dec. 31, 2016
Dec. 22, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number               2,134,214   2,134,214 1,909,764  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price               $ 6   $ 6 $ 6.19  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term               8 years 357 days     9 years 43 days  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross               229,860        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value                 $ 2,000      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options               $ 3,878,000   $ 3,878,000    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition               3 years 51 days        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period                      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate               0.00% 0.00%      
Employee Stock Option [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate               0.00%        
Two Thousand Five Plan [Member]                        
Common Stock, Capital Shares Reserved for Future Issuance               1,892   1,892    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number               1,892   1,892    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price               $ 116.29   $ 116.29    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term               175 days        
The 2006 Stock Option Plan [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number               38,378   38,378    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price               $ 10.49   $ 10.49    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term               5 years 229 days        
The 2013 Plan [Member]                        
Common Stock, Capital Shares Reserved for Future Issuance               308,995   308,995    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number               2,093,944   2,093,944    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price               $ 5.82   $ 5.82    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term               9 years 18 days        
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period               10 years        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period               4 years        
Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Outstanding Stock Maximum               10.00%        
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent               110.00%        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized, Percentage Increase of Outstanding Common Stock   4.00%                    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized 523,209                      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 2,523,209                     2,000,000
The 2013 Plan [Member] | Employees [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross               229,860 129,267      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value               $ 1.96 $ 3.56      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period               0        
The 2013 Plan [Member] | Nonemployees [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross               0 0      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period               0 0      
The 2013 Plan [Member] | Restricted Stock [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number               12,500   12,500    
The 2013 Plan [Member] | Restricted Stock [Member] | Employees [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period             39,494          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value             $ 6.24          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period         89              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period     39,405                  
The 2013 Plan [Member] | Restricted Stock [Member] | Board Members [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period       6,544   5,998            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value       $ 5.91   $ 7.89            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period       6,544   5,998            
The 2013 Plan [Member] | Restricted Stock [Member] | Consultant [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period         1 year              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period         25,000              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value         $ 7.58              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period                   12,500    
The 2013 Plan [Member] | Holdings Greater Than 10 Percent of Shares Outstanding [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period               5 years        
The 2013 Plan [Member] | Quarterly [Member] | Restricted Stock [Member] | Consultant [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage         25.00%