Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Net revenues:
Revenue	$ 2,622	$ 1,932	$ 6,869	$ 5,306
Costs and expenses:
Cost of sales	2,144	1,361	5,654	3,549
Selling, general and administrative expenses	1,202	1,051	3,464	3,686
Total costs and expenses	3,346	2,412	9,118	7,235
Operating loss	(724)	(480)	(2,249)	(1,929)
Other income:
Settlement of litigation	0	0	3,100	0
Interest income, net	289	235	872	424
Income from governmental assistance programs	0	4	0	34
Income (loss) before income taxes	(435)	(241)	1,723	(1,471)
Provision for income tax expense	(14)	0	74	0
Net income (loss)	$ (421)	$ (241)	$ 1,649	$ (1,471)
Basic income (loss) per share (in dollars per share)	$ (0.02)	$ (0.01)	$ 0.08	$ (0.07)
Diluted income (loss) per share (in dollars per share)	$ (0.02)	$ (0.01)	$ 0.08	$ (0.07)
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	$ 2,599	$ 1,704	$ 6,745	$ 4,335
License [Member]
Net revenues:
Revenue	23	123	124	271
Royalty [Member]
Net revenues:
Revenue	$ 0	$ 105	$ 0	$ 700