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Note 6 - Inventories - Schedule of Inventory (Details) - USD ($)
Sep. 30, 2019
Sep. 30, 2018
Raw materials $ 5,060,331 $ 4,487,273
Finished goods 998,607 1,768,544
Work in process 306,809 875,417
Inventories, gross 6,365,747 7,131,234
Reserve for obsolescence (530,584) (397,051)
Inventories, net $ 5,835,163 $ 6,734,183