Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Net revenues:
Revenue	$ 2,738,000	$ 2,438,000	$ 4,936,000	$ 4,247,000
Costs and expenses:
Cost of sales	2,466,000	2,040,000	4,470,000	3,510,000
Selling, general and administrative expenses	1,389,000	1,064,000	2,805,000	2,262,000
Total cost of sales and SG&A	3,855,000	3,104,000	7,275,000	5,772,000
Operating loss	(1,117,000)	(666,000)	(2,339,000)	(1,525,000)
Other income:
Settlement of litigation	0	3,100,000	0	3,100,000
Interest income, net	236,000	289,000	499,000	583,000
(Loss) income before income taxes	(881,000)	2,723,000	(1,840,000)	2,158,000
Provision for income tax expense	0	88,000	3,000	88,000
Net (loss) income	$ (881,000)	$ 2,635,000	$ (1,843,000)	$ 2,070,000
Basic (loss) income per share (in dollars per share)	$ (0.04)	$ 0.13	$ (0.09)	$ 0.1
Diluted (loss) income per share (in dollars per share)	$ (0.04)	$ 0.13	$ (0.09)	$ 0.1
Weighted average shares outstanding
Basic (in shares)	21,042,652	21,042,652	21,042,652	21,042,652
Diluted (in shares)	21,042,652	21,042,652	21,042,652	21,042,652
Product [Member]
Net revenues:
Revenue	$ 2,670,000	$ 2,414,000	$ 4,799,000	$ 4,146,000
License [Member]
Net revenues:
Revenue	$ 68,000	$ 24,000	$ 137,000	$ 101,000