CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement
Net revenues	$ 11,740	$ 12,832	$ 24,759	$ 24,098
Cost of revenues	5,172	4,801	9,948	10,279
Gross profit	6,568	8,031	14,811	13,819
Operating expenses:
Research and development	5,833	5,752	11,428	10,602
Selling, general and administrative	2,658	2,673	5,535	5,270
Total operating expenses	8,491	8,425	16,963	15,872
Loss from operations	(1,923)	(394)	(2,152)	(2,053)
Interest income, net	215	154	420	292
Other expense, net	(5)	(9)	(63)	(124)
Loss before income taxes	(1,713)	(249)	(1,795)	(1,885)
Provision for income taxes	55	102	98	112
Net loss	$ (1,768)	$ (351)	$ (1,893)	$ (1,997)
Net loss per share:
Basic	$ (0.08)	$ (0.02)	$ (0.08)	$ (0.09)
Diluted	$ (0.08)	$ (0.02)	$ (0.08)	$ (0.09)
Weighted average shares used in per share calculations:
Basic	22,975	21,844	22,791	21,707
Diluted	22,975	21,844	22,791	21,707