Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common stock	Additional paid-in capital	Accumulated other comprehensive loss	Retained earnings
Balance, beginning at Dec. 31, 2019	$ 1,493,570	$ 9	$ 1,164,400	$ (1,628)	$ 330,789
Balance, beginning (in shares) at Dec. 31, 2019		91,576,060
Net loss	(33,427)				(33,427)
Currency translation	(643)			(643)
Stock-based compensation	24,994		24,994
Stock option exercises and vesting of restricted stock units, net of withholdings and other	1,414		1,414
Stock option exercises and vesting of restricted stock units, net of withholdings and other (in shares)		494,525
Shares repurchased and retired to satisfy tax withholding upon vesting	(8,051)		(8,051)
Shares repurchased and retired to satisfy tax withholding upon vesting (in shares)		(153,607)
Balance, ending at Mar. 31, 2020	1,477,857	$ 9	1,182,757	(2,271)	297,362
Balance, ending (in shares) at Mar. 31, 2020		91,916,978
Balance, beginning at Dec. 31, 2020	1,416,797	$ 9	1,243,135	(1,275)	174,928
Balance, beginning (in shares) at Dec. 31, 2020		93,046,676
Net loss	(75,461)				(75,461)
Currency translation	108			108
Stock-based compensation	25,519		25,519
Stock option exercises and vesting of restricted stock units, net of withholdings and other	1,088		1,088
Stock option exercises and vesting of restricted stock units, net of withholdings and other (in shares)		382,040
Shares repurchased and retired to satisfy tax withholding upon vesting	(9,028)		(9,028)
Shares repurchased and retired to satisfy tax withholding upon vesting (in shares)		(122,326)
Balance, ending at Mar. 31, 2021	$ 1,359,023	$ 9	$ 1,260,714	$ (1,167)	$ 99,467
Balance, ending (in shares) at Mar. 31, 2021		93,306,390