CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative effect, period of adoption, adjustment	Common Stock	Additional Paid-In Capital	Additional Paid-In Capital Cumulative effect, period of adoption, adjustment	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Accumulated Deficit Cumulative effect, period of adoption, adjustment
Balances at beginning of period (in shares) at Dec. 31, 2020			117,489
Balances at beginning of period at Dec. 31, 2020	$ 431,831		$ 1,174	$ 1,344,337		$ 3,203	$ (916,883)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)			608
Issuance of common stock upon exercise of stock options	15,135		$ 6	15,129
Issuance of common stock for settlement of RSUs and PRSUs (in shares)			1,312
Issuance of common stock for settlement of RSUs and PRSUs	(6,303)		$ 13	(6,316)
Issuance of common stock in connection with employee stock purchase plan (in shares)			380
Issuance of common stock in connection with employee stock purchase plan	27,655		$ 4	27,651
Share-based compensation	111,316			111,316
Other comprehensive loss	(8,419)					(8,419)
Net loss	(107,372)						(107,372)
Other	284						284
Balances at end of period (in shares) at Jun. 30, 2021			119,789
Balances at end of period at Jun. 30, 2021	464,127		$ 1,197	1,492,117		(5,216)	(1,023,971)
Balances at beginning of period (in shares) at Dec. 31, 2020			117,489
Balances at beginning of period at Dec. 31, 2020	$ 431,831		$ 1,174	1,344,337		3,203	(916,883)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting standards update	Accounting Standards Update 2020-06
Balances at end of period (in shares) at Dec. 31, 2021			121,598
Balances at end of period at Dec. 31, 2021	$ 489,218	$ (164,576)	$ 1,215	1,637,157	$ (245,690)	(8,911)	(1,140,243)	$ 81,114
Balances at beginning of period (in shares) at Mar. 31, 2021			118,358
Balances at beginning of period at Mar. 31, 2021	430,243		$ 1,183	1,399,014		(4,329)	(965,625)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)			400
Issuance of common stock upon exercise of stock options	11,204		$ 4	11,200
Issuance of common stock for settlement of RSUs and PRSUs (in shares)			651
Issuance of common stock for settlement of RSUs and PRSUs	(3,504)		$ 6	(3,510)
Issuance of common stock in connection with employee stock purchase plan (in shares)			380
Issuance of common stock in connection with employee stock purchase plan	27,655		$ 4	27,651
Share-based compensation	57,762			57,762
Other comprehensive loss	(887)					(887)
Net loss	(58,407)						(58,407)
Other	61						61
Balances at end of period (in shares) at Jun. 30, 2021			119,789
Balances at end of period at Jun. 30, 2021	464,127		$ 1,197	1,492,117		(5,216)	(1,023,971)
Balances at beginning of period (in shares) at Dec. 31, 2021			121,598
Balances at beginning of period at Dec. 31, 2021	$ 489,218	$ (164,576)	$ 1,215	1,637,157	$ (245,690)	(8,911)	(1,140,243)	$ 81,114
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)	378		378
Issuance of common stock upon exercise of stock options	$ 12,232		$ 4	12,228
Issuance of common stock for settlement of RSUs and PRSUs (in shares)			958
Issuance of common stock for settlement of RSUs and PRSUs	(3,956)		$ 10	(3,966)
Issuance of common stock in connection with employee stock purchase plan (in shares)			344
Issuance of common stock in connection with employee stock purchase plan	29,837		$ 3	29,834
Share-based compensation	139,359			139,359
Other comprehensive loss	(13,217)					(13,217)
Net loss	(162,028)						(162,028)
Other	(48)					(48)
Balances at end of period (in shares) at Jun. 30, 2022			123,278
Balances at end of period at Jun. 30, 2022	326,821		$ 1,232	1,568,922		(22,176)	(1,221,157)
Balances at beginning of period (in shares) at Mar. 31, 2022			122,369
Balances at beginning of period at Mar. 31, 2022	327,100		$ 1,223	1,465,489		(13,537)	(1,126,075)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)			43
Issuance of common stock upon exercise of stock options	1,416		$ 1	1,415
Issuance of common stock for settlement of RSUs and PRSUs (in shares)			522
Issuance of common stock for settlement of RSUs and PRSUs	(2,261)		$ 6	(2,267)
Issuance of common stock in connection with employee stock purchase plan (in shares)			344
Issuance of common stock in connection with employee stock purchase plan	29,837		$ 3	29,834
Share-based compensation	74,451			74,451
Other comprehensive loss	(8,639)					(8,639)
Net loss	(95,082)						(95,082)
Balances at end of period (in shares) at Jun. 30, 2022			123,278
Balances at end of period at Jun. 30, 2022	$ 326,821		$ 1,232	$ 1,568,922		$ (22,176)	$ (1,221,157)