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, 2019	$ 375,946	$ 648	$ 264,908	$ 111,621	$ (1,231)
Balance, Shares at Mar. 31, 2019		64,838
Common stock issued under stock plans, net of shares withheld for taxes	(1,305)	$ 6	(1,311)
Common stock issued under stock plans, net of shares withheld for taxes, Shares		545
Stock-based compensation	4,891		4,891
Other comprehensive income:
Translation adjustments	54				54
Net income (loss)	1,244			1,244
Balance at Jun. 30, 2019	380,830	$ 654	268,488	112,865	(1,177)
Balance, Shares at Jun. 30, 2019		65,383
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