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Note 8 - Property and Equipment - Property and Equipment (Details) - USD ($)
Mar. 31, 2018
Sep. 30, 2017
Property and equipment $ 2,440,189 $ 2,163,797
Accumulated depreciation (1,956,722) (1,654,194)
Property and equipment, net 483,467 509,603
Furniture and Fixtures [Member]    
Property and equipment 1,296,249 1,093,502
Machinery and Equipment [Member]    
Property and equipment 1,067,802 994,157
Leasehold Improvements [Member]    
Property and equipment $ 76,138 $ 76,138