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Note 6 - Inventories - Schedule of Inventory (Details) - USD ($)
Jun. 30, 2020
Sep. 30, 2019
Raw materials $ 6,454,321 $ 5,060,331
Finished goods 1,115,923 998,607
Work in process 462,767 306,809
Inventories, gross 8,033,011 6,365,747
Reserve for obsolescence (698,846) (530,584)
Inventories, net $ 7,334,165 $ 5,835,163