Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Net revenues:
Revenue	$ 1,932	$ 2,574	$ 5,306	$ 6,485
Costs and expenses:
Cost of sales	1,361	1,826	3,549	4,786
Selling, general and administrative expenses	1,051	1,469	3,686	4,207
Costs and Expenses, Total	2,412	3,295	7,235	8,993
Operating loss	(480)	(721)	(1,929)	(2,508)
Other (loss) income:
Loss on settlement of litigation	0	(450)	0	(450)
Interest income, net	235	7	424	40
Income from governmental assistance programs	4	0	34	207
Loss before income taxes	(241)	(1,164)	(1,471)	(2,711)
Provision for income tax expense	0	0	0	0
Net loss	$ (241)	$ (1,164)	$ (1,471)	$ (2,711)
Basic loss per share (in dollars per share)	$ (0.01)	$ (0.06)	$ (0.07)	$ (0.13)
Diluted loss per share (in dollars per share)	$ (0.01)	$ (0.06)	$ (0.07)	$ (0.13)
Weighted average shares outstanding
Basic (in shares)	21,043	21,043	21,043	21,043
Diluted (in shares)	21,043	21,043	21,043	21,043
Product [Member]
Net revenues:
Revenue	$ 1,704	$ 2,509	$ 4,335	$ 6,290
License [Member]
Net revenues:
Revenue	$ 228	$ 65	$ 971	$ 195