Unaudited Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Cumulative Effect Period Of Adoption Adjusted Balance Retained Earnings	Cumulative Effect Period Of Adoption Adjusted Balance	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Total
Beginning balance (in shares) at Dec. 31, 2019			59,497,759		20,220,227
Beginning balance at Dec. 31, 2019	$ (640)	$ (640)	$ 1	$ 528,272	$ (155,947)	$ 172,265	$ (1,096)	$ 543,495
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee plans, net (in shares)			315,404
Issuance of common stock under employee plans, net				(5,162)				(5,162)
Stock-based compensation				20,195				20,195
Net (loss) income						4,074		4,074
Foreign currency translation adjustments							(2,372)	(2,372)
Ending balance (in shares) at Mar. 31, 2020			59,813,163		20,220,227
Ending balance at Mar. 31, 2020			$ 1	543,305	$ (155,947)	175,699	(3,468)	559,590
Beginning balance (in shares) at Dec. 31, 2019			59,497,759		20,220,227
Beginning balance at Dec. 31, 2019	$ (640)	$ (640)	$ 1	528,272	$ (155,947)	172,265	(1,096)	543,495
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income								(26,685)
Foreign currency translation adjustments								(1,694)
Ending balance (in shares) at Jun. 30, 2020			63,468,347		20,220,227
Ending balance at Jun. 30, 2020			$ 1	883,609	$ (155,947)	144,940	(2,790)	869,813
Beginning balance (in shares) at Mar. 31, 2020			59,813,163		20,220,227
Beginning balance at Mar. 31, 2020			$ 1	543,305	$ (155,947)	175,699	(3,468)	559,590
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)			3,450,000
Issuance of common stock				306,779				306,779
Issuance of common stock under employee plans, net (in shares)			134,571
Issuance of common stock under employee plans, net				(310)				(310)
Stock-based compensation				33,835				33,835
Issuance of common stock for business combination contingent consideration (in shares)			70,613
Net (loss) income						(30,759)		(30,759)
Foreign currency translation adjustments							678	678
Ending balance (in shares) at Jun. 30, 2020			63,468,347		20,220,227
Ending balance at Jun. 30, 2020			$ 1	883,609	$ (155,947)	144,940	(2,790)	869,813
Beginning balance (in shares) at Dec. 31, 2020			63,766,555		20,220,227
Beginning balance at Dec. 31, 2020			$ 1	962,159	$ (155,947)	169,901	141	976,255
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 (loss) income						(47,917)		(47,917)
Foreign currency translation adjustments							1	1
Ending balance (in shares) at Mar. 31, 2021			64,673,091		20,220,227
Ending balance at Mar. 31, 2021			$ 1	1,044,724	$ (155,947)	121,984	142	1,010,904
Beginning balance (in shares) at Dec. 31, 2020			63,766,555		20,220,227
Beginning balance at Dec. 31, 2020			$ 1	962,159	$ (155,947)	169,901	141	976,255
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income								(95,034)
Foreign currency translation adjustments								(368)
Ending balance (in shares) at Jun. 30, 2021			65,674,346		20,220,227
Ending balance at Jun. 30, 2021			$ 1	1,179,005	$ (155,947)	74,867	(227)	1,097,699
Beginning balance (in shares) at Mar. 31, 2021			64,673,091		20,220,227
Beginning balance at Mar. 31, 2021			$ 1	1,044,724	$ (155,947)	121,984	142	1,010,904
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee plans, net (in shares)			1,001,255
Issuance of common stock under employee plans, net				(3,268)				(3,268)
Stock-based compensation				137,549				137,549
Net (loss) income						(47,117)		(47,117)
Foreign currency translation adjustments							(369)	(369)
Ending balance (in shares) at Jun. 30, 2021			65,674,346		20,220,227
Ending balance at Jun. 30, 2021			$ 1	$ 1,179,005	$ (155,947)	$ 74,867	$ (227)	$ 1,097,699