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Note 6 - Property and Equipment - Property and Equipment (Details) - USD ($)
Jun. 30, 2017
Sep. 30, 2016
Property and equipment $ 2,176,171 $ 2,006,423
Accumulated depreciation (1,619,349) (1,533,079)
Property and equipment, net 556,822 473,344
Furniture and Fixtures [Member]    
Property and equipment 1,104,417 976,856
Machinery and Equipment [Member]    
Property and equipment 995,616 957,829
Leasehold Improvements [Member]    
Property and equipment $ 76,138 $ 71,738