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Note 5 - Inventories - Schedule of Inventory (Details) - USD ($)
Dec. 31, 2017
Sep. 30, 2017
Raw materials $ 4,619,587 $ 3,784,935
Finished goods 900,645 1,742,960
Work in process 198,535 147,871
Inventories, gross 5,718,767 5,675,766
Reserve for obsolescence (458,833) (418,532)
Inventories, net $ 5,259,934 $ 5,257,234