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Note 6 - Inventories - Schedule of Inventory (Details) - USD ($)
Sep. 30, 2018
Sep. 30, 2017
Raw materials $ 4,487,273 $ 3,784,935
Finished goods 1,768,544 1,742,960
Work in process 875,417 147,871
Inventories, gross 7,131,234 5,675,766
Reserve for obsolescence (397,051) (418,532)
Inventories, net $ 6,734,183 $ 5,257,234