Note 4 - Property and Equipment - Major Classes of Property and Equipment (Details) - USD ($)	Mar. 31, 2023	Sep. 30, 2022
Property and equipment, gross	$ 2,055,039	$ 1,877,671
Less accumulated depreciation	(1,256,862)	(1,054,361)
Property and equipment, net	798,177	823,310
Computers, Furniture, and Equipment [Member]
Property and equipment, gross	1,272,596	1,095,228
Manufacturing Equipment [Member]
Property and equipment, gross	284,275	284,275
Leasehold Improvements [Member]
Property and equipment, gross	487,081	487,081
Automobiles [Member]
Property and equipment, gross	$ 11,087	$ 11,087