Note 6 - Inventories - Components of Inventory (Details) - USD ($)	Jun. 30, 2021	Sep. 30, 2020
Raw materials	$ 16,881,148	$ 12,287,134
Work-in-process	2,866,264	1,033,021
Finished goods	2,373,251	2,048,514
Inventories, gross	22,120,663	15,368,669
Inventory reserve	(1,141,524)	(960,131)
Inventories, net	$ 20,979,139	$ 14,408,538

Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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