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Note 6 - Inventories - Schedule of Inventory (Details) - USD ($) | Mar. 31, 2020 | Sep. 30, 2019
--- | --- | ---
Raw materials | $ 5,591,252 | $ 5,060,331
Finished goods | 920,663 | 998,607
Work in process | 1,068,097 | 306,809
Inventories, gross | 7,580,012 | 6,365,747
Reserve for obsolescence | (658,183) | (530,584)
Inventories, net | $ 6,921,829 | $ 5,835,163

X
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