Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands		Total	Common Stock		Treasury Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
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		(2,298)	$ 3			(2,301)
Common stock issued under stock plans, net of shares withheld for taxes, Shares			293,000
Stock-based compensation		6,412				6,412
Other comprehensive income (loss):
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			67,362,000
Balance at Mar. 31, 2021		431,644	$ 671			304,263	128,634	(1,924)
Balance, Shares at Mar. 31, 2021			67,069,000
Other comprehensive income (loss):
Translation adjustments		(9)
Net income (loss)		1,270
Balance at Dec. 31, 2021		411,143	$ 690		$ (35,874)	318,356	129,904	(1,933)
Balance, Shares at Dec. 31, 2021			66,865,000
Balance at Jun. 30, 2021		438,568	$ 674			308,374	131,482	(1,962)
Balance, Shares at Jun. 30, 2021			67,362,000
Common stock issued under stock plans, net of shares withheld for taxes		(1,794)	$ 10			(1,804)
Common stock issued under stock plans, net of shares withheld for taxes, Shares			1,032,000
Stock-based compensation		5,223				5,223
Other comprehensive income (loss):
Translation adjustments		50						50
Net income (loss)		(6,771)					(6,771)
Balance at Sep. 30, 2021		435,276	$ 684			311,793	124,711	(1,912)
Balance, Shares at Sep. 30, 2021			68,394,000
Common stock issued under stock plans, net of shares withheld for taxes		(481)	$ 6			(487)
Common stock issued under stock plans, net of shares withheld for taxes, Shares			641,000
Stock-based compensation		7,050				7,050
Repurchase of common stock	[1]	(35,874)			(35,874)
Repurchase of common stock, Shares	[1]		(2,170,000)
Other comprehensive income (loss):
Translation adjustments		(21)						(21)
Net income (loss)		5,193					5,193
Balance at Dec. 31, 2021		411,143	$ 690		(35,874)	318,356	129,904	(1,933)
Balance, Shares at Dec. 31, 2021			66,865,000
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
Common stock issued under stock plans, net of shares withheld for taxes		(1,600)	$ 12			(1,612)
Common stock issued under stock plans, net of shares withheld for taxes, Shares			1,137,000
Stock-based compensation		8,766				8,766
Repurchase of common stock	[2]	(2,505)			(2,505)
Repurchase of common stock, Shares	[2]		(148,000)
Other comprehensive income (loss):
Translation adjustments		(28)						(28)
Net income (loss)		1,148					1,148
Balance at Jun. 30, 2022		428,859	$ 704		(38,379)	337,071	131,400	(1,937)
Balance, Shares at Jun. 30, 2022			68,064,000
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
Other comprehensive income (loss):
Translation adjustments		44
Net income (loss)		22,586
Balance at Dec. 31, 2022		417,764	$ 709		(85,752)	351,834	152,838	(1,865)
Balance, Shares at Dec. 31, 2022			66,039,000
Balance at Jun. 30, 2022		428,859	$ 704		(38,379)	337,071	131,400	(1,937)
Balance, Shares at Jun. 30, 2022			68,064,000
Common stock issued under stock plans, net of shares withheld for taxes		(1,949)				(1,949)
Common stock issued under stock plans, net of shares withheld for taxes, Shares			(31,000)
Stock-based compensation		8,687				8,687
Repurchase of common stock	[3]	(7,373)			(7,373)
Repurchase of common stock, Shares	[3]		(428,000)
Other comprehensive income (loss):
Translation adjustments		(5)						(5)
Net income (loss)		13,623					13,623
Balance at Sep. 30, 2022		441,842	$ 704		(45,752)	343,809	145,023	(1,942)
Balance, Shares at Sep. 30, 2022			67,605,000
Common stock issued under stock plans, net of shares withheld for taxes		(1,033)	$ 5			(1,038)
Common stock issued under stock plans, net of shares withheld for taxes, Shares			537,000
Stock-based compensation		9,063				9,063
Repurchase of common stock	[4]	$ (40,000)			(40,000)
Repurchase of common stock, Shares		(2,103,049)	(2,103,000)	[4]
Other comprehensive income (loss):
Translation adjustments		$ 77						77
Net income (loss)		7,815					7,815
Balance at Dec. 31, 2022		$ 417,764	$ 709		$ (85,752)	$ 351,834	$ 152,838	$ (1,865)
Balance, Shares at Dec. 31, 2022			66,039,000

[1] Weighted-average repurchase price (dollars per share) for the three months ended December 31, 2021 was $16.53.

[2] Weighted-average repurchase price (dollars per share) for the three months ended June 30, 2022 was $16.93.

[3] Weighted-average repurchase price (dollars per share) for the three months ended September 30, 2022 was $17.21.

[4] Weighted-average repurchase price (dollars per share) for the three months ended December 31, 2022 was $19.02.