Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands		Total	Common Stock		Treasury 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			64,838,000
Common stock issued under stock plans, net of shares withheld for taxes		(1,732)	$ 13			(1,745)
Common stock issued under stock plans, net of shares withheld for taxes, Shares			1,296,000
Stock-based compensation		19,694				19,694
Other comprehensive income:
Translation adjustments		(912)						(912)
Net income		7,498					7,498
Balance at Mar. 31, 2020		400,494	$ 661			282,857	119,119	(2,143)
Balance, Shares at Mar. 31, 2020			66,134,000
Common stock issued under stock plans, net of shares withheld for taxes		(1,294)	$ 10			(1,304)
Common stock issued under stock plans, net of shares withheld for taxes, Shares			935,000
Stock-based compensation		22,710				22,710
Other comprehensive income:
Translation adjustments		219						219
Net income		9,515					9,515
Balance at Mar. 31, 2021		431,644	$ 671			304,263	128,634	(1,924)
Balance, Shares at Mar. 31, 2021			67,069,000
Common stock issued under stock plans, net of shares withheld for taxes		(877)	$ 21			(898)
Common stock issued under stock plans, net of shares withheld for taxes, Shares			2,176,000
Stock-based compensation		26,552				26,552
Repurchase of common stock	[1]	$ (35,874)			$ (35,874)
Repurchase of common stock, Shares		(2,169,896)	(2,170,000)	[1]
Other comprehensive income:
Translation adjustments		$ 15						15
Net income		1,618					1,618
Balance at Mar. 31, 2022		$ 423,078	$ 692		$ (35,874)	$ 329,917	$ 130,252	$ (1,909)
Balance, Shares at Mar. 31, 2022			67,075,000

[1] Weighted-average repurchase price (dollars per share) for the year ended March 31, 2022 was $16.53.