Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Stock Based Compensation (Details Textual)

v3.6.0.2
Note 4 - Stock Based Compensation (Details Textual) - USD ($)
3 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Allocated Share-based Compensation Expense $ 593,746 $ 226,767
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized $ 6,860,649  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 7 years 292 days  
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, Outstanding, Weighted Average Remaining Contractual Term 3 years 73 days  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value $ 788,892  
Proceeds from Stock Options Exercised $ 17 $ 34,990
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period 10,000 8,000
Employee Stock Purchase Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Market Price Percentage, Offering Date 85.00%  
Stock Issued During Period, Shares, Employee Stock Purchase Plans 11,144 10,352
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price $ 15.21 $ 11.40
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 131,978  
Restricted Stock [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value  
Restricted Stock [Member] | Stock Compensation Plan 2007 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 0  
Restricted Stock [Member] | Employees [Member] | Stock Compensation Plan 2007 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period   5 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period   8,500
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value   $ 13.64
Minimum [Member] | Restricted Stock [Member] | Employee and Non-Employee Directors [Member] | Stock Compensation Plan 2007 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 1 year  
Maximum [Member] | Restricted Stock [Member] | Employee and Non-Employee Directors [Member] | Stock Compensation Plan 2007 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 10 years  
Selling, General and Administrative Expenses [Member]    
Allocated Share-based Compensation Expense $ 539,046 $ 204,881
Cost of Sales [Member]    
Allocated Share-based Compensation Expense $ 54,700 $ 21,886