UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Income (loss).	Total
Beginning balance at Dec. 31, 2020	$ 1	$ 962,159	$ (155,947)	$ 169,901	$ 141	$ 976,255
Beginning balance (in shares) at Dec. 31, 2020	63,766,555		20,220,227
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee plans, net (in shares)	906,536
Issuance of common stock under employee plans, net		(7,045)				(7,045)
Stock-based compensation		89,610				89,610
Net income (loss)				(47,917)		(47,917)
Other comprehensive (loss) income, net					1	1
Ending balance at Mar. 31, 2021	$ 1	1,044,724	$ (155,947)	121,984	142	1,010,904
Ending balance (in shares) at Mar. 31, 2021	64,673,091		20,220,227
Beginning balance at Dec. 31, 2021	$ 1	1,095,229	$ (155,947)	109,883	(1,317)	1,047,849
Beginning balance (in shares) at Dec. 31, 2021	70,896,856		20,220,227
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock		(70)				(70)
Issuance of common stock under employee plans, net (in shares)	99,802
Issuance of common stock under employee plans, net		(1,388)				(1,388)
Stock-based compensation		25,088				25,088
Net income (loss)				54,871		54,871
Other comprehensive (loss) income, net					(1,561)	(1,561)
Ending balance at Mar. 31, 2022	$ 1	$ 1,118,859	$ (155,947)	$ 164,754	$ (2,878)	$ 1,124,789
Ending balance (in shares) at Mar. 31, 2022	70,996,658		20,220,227