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Note 10 - Summary of Share-based Compensation Expense (Details) - USD ($)
3 Months Ended 9 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Cost of Sales [Member]        
Share-based compensation expense $ 6,157 $ 7,024 $ 17,895 $ 18,695
Selling, General and Administrative Expenses [Member]        
Share-based compensation expense 115,864 119,653 362,224 350,099
Research and Development Expense [Member]        
Share-based compensation expense 26,001 26,186 76,160 92,923
Share-based compensation expense $ 148,022 $ 152,863 $ 456,279 $ 461,717