CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Net revenues	$ 6,621	$ 13,019
Cost of revenues	3,571	4,776
Gross profit	3,050	8,243
Operating expenses:
Research and development	5,825	5,595
Selling, general and administrative	2,920	2,877
Total operating expenses	8,745	8,472
Loss from operations	(5,695)	(229)
Interest income, net	114	205
Other expense, net	(8)	(58)
Loss before income taxes	(5,589)	(82)
Provision for income taxes	487	43
Net loss	$ (6,076)	$ (125)
Net loss per share:
Basic	$ (0.26)	$ (0.01)
Diluted	$ (0.26)	$ (0.01)
Weighted average shares used in per share calculations:
Basic	23,440	22,605
Diluted	23,440	22,605