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Note 12 - Share-based Compensation - Summary of Share-based Compensation Expense (Details) - USD ($)
12 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Allocated Share-based Compensation Expense $ 1,116,400 $ 605,426
Cost of Sales [Member]    
Allocated Share-based Compensation Expense 24,151 24,092
Selling, General and Administrative Expenses [Member]    
Allocated Share-based Compensation Expense 998,540 478,695
Research and Development Expense [Member]    
Allocated Share-based Compensation Expense $ 93,709 $ 102,639