Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss
Balance at Dec. 31, 2020	$ 368,190	$ 674	$ 1,530,493	$ (1,156,173)	$ (6,804)
Balance, Shares at Dec. 31, 2020		67,387
Net income	5,278			5,278
Other comprehensive income (loss), net of tax	1,200				1,200
Shares issued in connection with stock-based compensation plans, net	(5,630)	$ 11	(5,641)
Shares issued in connection with stock-based compensation plans, net, Shares		1,144
Stock-based compensation	4,978		4,978
Balance at Mar. 31, 2021	374,016	$ 685	1,529,830	(1,150,895)	(5,604)
Balance, Shares at Mar. 31, 2021		68,531
Balance at Dec. 31, 2021	398,020	$ 692	1,544,712	(1,145,382)	(2,002)
Balance, Shares at Dec. 31, 2021		69,170
Net income	4,340			4,340
Other comprehensive income (loss), net of tax	1,202				1,202
Repurchases of common stock(shares)		(338)
Repurchases of common stock (value)	(5,000)	$ (3)	(4,997)
Shares issued in connection with stock-based compensation plans, net	(7,696)	$ 9	(7,705)
Shares issued in connection with stock-based compensation plans, net, Shares		971
Stock-based compensation	5,221		5,221
Balance at Mar. 31, 2022	$ 396,087	$ 698	$ 1,537,231	$ (1,141,042)	$ (800)
Balance, Shares at Mar. 31, 2022		69,803