Note 4 - Property and Equipment - Major Classes of Property and Equipment (Details) - USD ($)	Dec. 31, 2023	Sep. 30, 2023
Property and equipment, gross	$ 2,359,854	$ 2,175,219
Less accumulated depreciation	(1,569,505)	(1,458,640)
Property and equipment, net	790,349	716,579
Computers, Furniture, and Equipment [Member]
Property and equipment, gross	1,577,411	1,392,776
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