Note 4 - Property and Equipment - Major Classes of Property and Equipment (Details) - USD ($)	Sep. 30, 2025	Sep. 30, 2024
Property and equipment, gross	$ 2,542,940	$ 2,358,767
Less accumulated depreciation	(2,265,563)	(1,904,499)
Property and equipment, net	277,377	454,268
Computers, Furniture, and Equipment [Member]
Property and equipment, gross	1,758,805	1,587,411
Manufacturing Equipment [Member]
Property and equipment, gross	288,554	284,275
Leasehold Improvements [Member]
Property and equipment, gross	$ 495,581	$ 487,081