Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Balance at Mar. 31, 2020	$ 400,494	$ 661	$ 282,857	$ 119,119	$ (2,143)
Balance, Shares at Mar. 31, 2020		66,134
Common stock issued under stock plans, net of shares withheld for taxes	(1,408)	$ 6	(1,414)
Common stock issued under stock plans, net of shares withheld for taxes, Shares		535
Stock-based compensation	5,393		5,393
Other comprehensive income:
Translation adjustments	(13)				(13)
Net income (loss)	(824)			(824)
Balance at Jun. 30, 2020	403,642	$ 667	286,836	118,295	(2,156)
Balance, Shares at Jun. 30, 2020		66,669
Balance at Mar. 31, 2021	431,644	$ 671	304,263	128,634	(1,924)
Balance, Shares at Mar. 31, 2021		67,069
Common stock issued under stock plans, net of shares withheld for taxes	(2,298)	$ 3	(2,301)
Common stock issued under stock plans, net of shares withheld for taxes, Shares		293
Stock-based compensation	6,412		6,412
Other comprehensive income:
Translation adjustments	(38)				(38)
Net income (loss)	2,848			2,848
Balance at Jun. 30, 2021	$ 438,568	$ 674	$ 308,374	$ 131,482	$ (1,962)
Balance, Shares at Jun. 30, 2021		67,362