CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Net revenues	$ 8,953,000	$ 7,797,000	$ 17,862,000	$ 16,588,000
Cost of revenues ($140, $67, $197 and $80 to a related party)	3,351,000	3,620,000	6,895,000	7,629,000
Gross profit	5,602,000	4,177,000	10,967,000	8,959,000
Operating expenses:
Research and development	6,395,000	5,907,000	13,014,000	12,010,000
Selling, general and administrative	2,412,000	2,787,000	5,100,000	5,827,000
Total operating expenses	8,807,000	8,694,000	18,114,000	17,837,000
Loss from operations	(3,205,000)	(4,517,000)	(7,147,000)	(8,878,000)
Interest income, net	55,000	18,000	77,000	41,000
Other expense, net	(41,000)	(26,000)	(37,000)	(69,000)
Loss before income taxes	(3,191,000)	(4,525,000)	(7,107,000)	(8,906,000)
Provision (benefit) for income taxes	37,000	42,000	97,000	(130,000)
Net loss	$ (3,228,000)	$ (4,567,000)	$ (7,204,000)	$ (8,776,000)
Net loss per share:
Basic	$ (0.13)	$ (0.19)	$ (0.29)	$ (0.36)
Diluted	$ (0.13)	$ (0.19)	$ (0.29)	$ (0.36)
Weighted average shares used in per share calculations:
Basic	24,554	24,229	24,538	24,162
Diluted	24,554	24,229	24,538	24,162