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Note 6 - Inventories - Schedule of Inventory (Details) - USD ($)
Mar. 31, 2019
Sep. 30, 2018
Raw materials $ 6,079,243 $ 4,487,273
Finished goods 1,969,021 1,768,544
Work in process 789,889 875,417
Inventories, gross 8,838,153 7,131,234
Reserve for obsolescence (532,310) (397,051)
Inventories, net $ 8,305,843 $ 6,734,183