Condensed Consolidated Changes In Stockholders' Equity (Statement) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2020		66,875
Beginning balance at Dec. 31, 2020	$ 514,205	$ 669	$ 665,530	$ (149,946)	$ (2,048)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	9,008			9,008
Other comprehensive income	808				808
Stock option exercises and employee stock plan purchases (in shares)		155
Stock option exercises and employee stock plan purchases	2,380	$ 1	2,379
Vesting of restricted stock awards and units (in shares)		489
Vesting of restricted stock awards and units	0	$ 5	(5)
Shares withheld to cover taxes (in shares)		(85)
Shares withheld to cover taxes	(1,599)	$ (1)	(1,598)
Stock-based compensation	3,317		3,317
Ending balance (in shares) at Mar. 31, 2021		67,434
Ending balance at Mar. 31, 2021	528,119	$ 674	669,623	(140,938)	(1,240)
Beginning balance (in shares) at Dec. 31, 2021		67,739
Beginning balance at Dec. 31, 2021	464,439	$ 677	685,472	(221,225)	(485)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	42,962			42,962
Other comprehensive income	2,396				2,396
Stock option exercises and employee stock plan purchases (in shares)		296
Stock option exercises and employee stock plan purchases	5,934	$ 3	5,931
Vesting of restricted stock awards and units (in shares)		645
Vesting of restricted stock awards and units	0	$ 7	(7)
Shares withheld to cover taxes (in shares)		(110)
Shares withheld to cover taxes	(5,504)	$ (1)	(5,503)
Stock-based compensation	5,623		5,623
Ending balance (in shares) at Mar. 31, 2022		68,570
Ending balance at Mar. 31, 2022	$ 515,850	$ 686	$ 691,516	$ (178,263)	$ 1,911