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Note 6 - Inventories - Schedule of Inventory (Details) - USD ($)
Dec. 31, 2018
Sep. 30, 2018
Raw materials $ 6,674,524 $ 4,487,273
Finished goods 2,232,627 1,768,544
Work in process 253,486 875,417
Inventories, gross 9,160,637 7,131,234
Reserve for obsolescence (451,905) (397,051)
Inventories, net $ 8,708,732 $ 6,734,183