CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Net revenues	$ 5,587,000	$ 8,909,000
Cost of revenues ($0 and $57 to a related party)	2,518,000	3,544,000
Gross profit	3,069,000	5,365,000
Operating expenses:
Research and development	5,204,000	6,619,000
Selling, general and administrative	3,004,000	2,688,000
Total operating expenses	8,208,000	9,307,000
Loss from operations	(5,139,000)	(3,942,000)
Interest income, net	143,000	22,000
Other income (expense), net	(63,000)	4,000
Loss before income taxes	(5,059,000)	(3,916,000)
Provision for income taxes	51,000	60,000
Net loss	$ (5,110,000)	$ (3,976,000)
Net loss per share:
Basic	$ (0.21)	$ (0.16)
Diluted	$ (0.21)	$ (0.16)
Weighted average shares used in per share calculations:
Basic	24,866	24,523
Diluted	24,866	24,523