Note 4 - Property and Equipment - Property and Equipment (Details) - USD ($)	Mar. 31, 2025	Mar. 31, 2024
Property and equipment, gross	$ 493,000	$ 298,000
Less accumulated depreciation and amortization	(282,000)	(203,000)
Total property and equipment	211,000	95,000
Computer Equipment [Member]
Property and equipment, gross	190,000	176,000
Furniture and Fixtures [Member]
Property and equipment, gross	10,000	10,000
Automobiles [Member]
Property and equipment, gross	163,000	0
Tools, Dies and Molds [Member]
Property and equipment, gross	$ 130,000	$ 112,000