CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ 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 Loss	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment
Beginning balance (in shares) at Dec. 31, 2019			121,584,000
Beginning balance at Dec. 31, 2019	$ 498,829	$ (88)	$ 122	$ 916,095		$ (1,096)	$ (416,292)	$ (88)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting standards update	Accounting Standards Update 2020-06 [Member]
Equity component of 2025/2026 convertible senior notes, net of issuance costs	$ 237,462			237,462
Purchase of 2025/2026 convertible senior notes capped call	(103,400)			(103,400)
Equity component related to conversions of 2023 convertible senior notes	(442,667)			(442,667)
Issuance of common stock upon conversion of 2023 convertible senior notes (in shares)			4,182,000
Issuance of common stock upon conversion of 2023 convertible senior notes	327,141		$ 4	327,137
Net proceeds from capped call related to conversions and extinguishments of 2023 notes and 2025 notes	77,095			77,095
Issuance of common stock upon exercise of stock options and ESPP (in shares)			1,154,000
Issuance of common stock upon exercise of stock options and ESPP	15,481		$ 1	15,480
Net issuance of common stock for settlement of RSUs (in shares)			2,424,000
Net share settlement of equity awards	(80,678)		$ 2	(80,680)
Share-based compensation expense	84,055			84,055
Other comprehensive loss	2,626					2,626
Net loss	(6,221)						(6,221)
Ending balance (in shares) at Dec. 31, 2020			129,344,000
Ending balance at Dec. 31, 2020	609,635	(378,138)	$ 129	1,030,577	$ (465,006)	1,530	(422,601)	86,868
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchase of common stock (in shares)			(8,403,000)
Repurchase of common stock	(300,000)		$ (8)	(299,992)
Issuance of common stock in connection with follow-on offering, net of offering costs (in shares)			10,975,000
Issuance of common stock in connection with follow-on offering, net of offering costs	1,091,466		$ 11	1,091,455
Equity component related to conversions of 2023 convertible senior notes	(236,921)			(236,921)
Issuance of common stock upon conversion of 2023 convertible senior notes (in shares)			2,983,000
Issuance of common stock upon conversion of 2023 convertible senior notes	235,521		$ 3	235,518
Net proceeds from capped call related to conversions and extinguishments of 2023 notes and 2025 notes	67,770			67,770
Issuance of common stock upon exercise of stock options and ESPP (in shares)			413,000
Issuance of common stock upon exercise of stock options and ESPP	8,885			8,885
Net issuance of common stock for settlement of RSUs (in shares)			1,640,000
Net share settlement of equity awards	(94,421)		$ 2	(94,423)
Share-based compensation expense	111,442			111,442
Other comprehensive loss	(6,864)					(6,864)
Net loss	$ (1,458)						(1,458)
Ending balance (in shares) at Dec. 31, 2021	136,951,956		136,952,000
Ending balance at Dec. 31, 2021	$ 1,106,917		$ 137	1,449,305		(5,334)	(337,191)
Beginning balance (in shares) at Dec. 31, 2020			129,344,000
Beginning balance at Dec. 31, 2020	$ 609,635	$ (378,138)	$ 129	1,030,577	$ (465,006)	1,530	(422,601)	$ 86,868
Ending balance (in shares) at Dec. 31, 2022	126,473,827		126,474,000
Ending balance at Dec. 31, 2022	$ 1,116,589		$ 126	1,244,504		(57,488)	(70,553)
Beginning balance (in shares) at Dec. 31, 2021	136,951,956		136,952,000
Beginning balance at Dec. 31, 2021	$ 1,106,917		$ 137	1,449,305		(5,334)	(337,191)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchase of common stock (in shares)			(12,709,000)
Repurchase of common stock	(323,528)		$ (13)	(323,515)
Issuance of common stock upon exercise of stock options and ESPP (in shares)			437,000
Issuance of common stock upon exercise of stock options and ESPP	6,475			6,475
Net issuance of common stock for settlement of RSUs (in shares)			1,794,000
Net share settlement of equity awards	(26,547)		$ 2	(26,549)
Share-based compensation expense	138,788			138,788
Other comprehensive loss	(52,154)					(52,154)
Net loss	$ 266,638						266,638
Ending balance (in shares) at Dec. 31, 2022	126,473,827		126,474,000
Ending balance at Dec. 31, 2022	$ 1,116,589		$ 126	$ 1,244,504		$ (57,488)	$ (70,553)