Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Net revenues:
Revenue	$ 2,438	$ 2,300	$ 4,247	$ 3,374
Costs and expenses:
Cost of sales	2,040	1,309	3,510	2,188
Selling, general and administrative expenses	1,064	1,291	2,262	2,635
Total costs and expenses	3,104	2,600	5,772	4,823
Operating loss	(666)	(300)	(1,525)	(1,449)
Other income:
Settlement of litigation	3,100	0	3,100	0
Interest income, net	289	139	583	189
Income from governmental assistance programs	0	8	0	30
Income (loss) before income taxes	2,723	(153)	2,158	(1,230)
Provision for income tax expense	88	0	88	0
Net income (loss)	$ 2,635	$ (153)	$ 2,070	$ (1,230)
Basic income (loss) per share (in dollars per share)	$ 0.13	$ (0.01)	$ 0.1	$ (0.06)
Diluted income (loss) per share (in dollars per share)	$ 0.13	$ (0.01)	$ 0.1	$ (0.06)
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	$ 2,414	$ 1,627	$ 4,146	$ 2,631
License [Member]
Net revenues:
Revenue	$ 24	$ 673	$ 101	$ 743