Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	APIC	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment
Beginning balance (in shares) at Dec. 31, 2018			104,337,508
Beginning balance at Dec. 31, 2018	$ 346,553	$ (3,690)	$ 10	$ 720,025	$ (373,482)	$ (3,690)
Increase (Decrease) in Stockholders' Equity
Net loss	(54,890)				(54,890)
Stock-based compensation	39,785			39,785
Shares issued in connection with employee stock plans, net of shares withheld for employee taxes (in shares)			2,528,322
Shares issued in connection with employee stock plans, net of shares withheld for employee taxes	(487)		$ 1	(488)
Ending balance (in shares) at Dec. 31, 2019			106,865,830
Ending balance at Dec. 31, 2019	327,271		$ 11	759,322	(432,062)
Increase (Decrease) in Stockholders' Equity
Net loss	76,544				76,544
Repurchase of common stock (in shares)			(9,282,485)
Repurchase of common stock	(42,335)		$ (1)	(42,334)
Stock-based compensation	25,456			25,456
Shares issued in connection with employee stock plans, net of shares withheld for employee taxes (in shares)			2,107,597
Shares issued in connection with employee stock plans, net of shares withheld for employee taxes	$ (4,154)			(4,154)
Ending balance (in shares) at Dec. 31, 2020	99,690,942		99,690,942
Ending balance at Dec. 31, 2020	$ 382,782		$ 10	738,290	(355,518)
Increase (Decrease) in Stockholders' Equity
Net loss	(38,329)				(38,329)
Repurchase of common stock (in shares)			(6,137,734)
Repurchase of common stock	(32,429)			(32,429)
Stock-based compensation	21,691			21,691
Shares issued in connection with employee stock plans, net of shares withheld for employee taxes (in shares)			2,660,035
Shares issued in connection with employee stock plans, net of shares withheld for employee taxes	$ (3,929)			(3,929)
Ending balance (in shares) at Dec. 31, 2021	96,213,243		96,213,243
Ending balance at Dec. 31, 2021	$ 329,786		$ 10	$ 723,623	$ (393,847)