Note 4 - Property and Equipment - Property and Equipment (Details) - USD ($)	Mar. 31, 2026	Mar. 31, 2025
Property and equipment, gross	$ 483,000	$ 493,000
Less accumulated depreciation and amortization	(354,000)	(282,000)
Total property and equipment	129,000	211,000
Computer Equipment [Member]
Property and equipment, gross	180,000	190,000
Furniture and Fixtures [Member]
Property and equipment, gross	10,000	10,000
Automobiles [Member]
Property and equipment, gross	163,000	163,000
Tools, Dies and Molds [Member]
Property and equipment, gross	$ 130,000	$ 130,000