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Note 12 - Stock Based Compensation (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Jun. 27, 2018
Apr. 12, 2018
May 09, 2017
May 18, 2016
Sep. 28, 2010
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Liability Options [Member]                  
Allocated Share-based Compensation Expense, Total           $ 623,496   $ 2,180,659  
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price $ 2.38                
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period 10 years                
Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Awards Vested           80.00%   80.00%  
Liability Options [Member] | Share-based Compensation Award, Tranche One [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 25.00%                
Liability Options [Member] | Share-based Compensation Award, Tranche Three [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 50.00%                
Liability Options [Member] | Share-based Compensation Award, Tranche Four [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 25.00%                
Liability Options [Member] | Share-based Compensation Award, Tranche Two [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 50.00%                
Liability Options [Member] | Chairman of the Board, President and Chief Executive Officer [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 2,300,000                
Liability Options [Member] | Chief Financial Officer, General Counsel and Secretary [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 700,000                
The 2010 Stock Option and Incentive Plan [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Period for Granting Shares         10 years        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross               611,668  
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price               $ 2.39  
The 2010 Stock Option and Incentive Plan [Member] | Employee Stock Option [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized         5,556        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized   500,000 125,000 11,111          
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  
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant           3,197   3,197  
Allocated Share-based Compensation Expense, Total           $ 332,063 $ 224,254 $ 726,252 $ 560,369
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares, Ending Balance           583,812   583,812  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options           $ 1,479,610   $ 1,479,610  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition               1 year 204 days