Condensed Consolidated Statements of Changes in Stockholders' Equity (Deficit) - USD ($) shares in Thousands, $ in Thousands	Common Stock	Additional Paid-In Capital Cumulative effect, period of adoption, adjustment	Additional Paid-In Capital	Accumulated Other Comprehensive Loss, Net	Accumulated Deficit Cumulative effect, period of adoption, adjustment	Accumulated Deficit	Cumulative effect, period of adoption, adjustment	Total
Balance at Dec. 31, 2020	$ 33		$ 2,233,937	$ (2,477)		$ (2,398,346)		$ (166,853)
Balance (in shares) at Dec. 31, 2020	33,016
Stock-based compensation			25,483					25,483
Repurchase of common stock	$ (4)		(75,821)					(75,825)
Repurchase of common stock, shares	(4,522)
Extinguishment of allocated costs related to exchange of convertible notes			(37,213)					(37,213)
Extinguishment of allocated costs related to repurchase of convertible notes			(1,933)					(1,933)
Bifurcation of conversion option upon issuance of convertible notes, net of issuance costs			147,458					147,458
Issuance of common stock for services	$ 1		9,999					10,000
Issuance of common stock for services (in shares)	770
Proceeds from capped call transactions			57					57
Issuance of common stock under equity plan			18					18
Issuance of common stock under equity plan (in shares)	353
Employee withholding taxes related to stock-based awards			(1,589)					(1,589)
Employee withholding taxes related to stock-based awards, (in shares)	(70)
Other comprehensive loss				(487)				(487)
Net income (loss)						(55,146)		(55,146)
Balance at Sep. 30, 2021	$ 30		2,300,396	(2,964)		(2,453,492)		(156,030)
Balance (in shares) at Sep. 30, 2021	29,547
Balance at Jun. 30, 2021	$ 33		2,249,497	(2,865)		(2,449,860)		(203,195)
Balance (in shares) at Jun. 30, 2021	33,201
Stock-based compensation			8,616					8,616
Repurchase of common stock	$ (4)		(75,821)					(75,825)
Repurchase of common stock, shares	(4,522)
Extinguishment of allocated costs related to exchange of convertible notes			(37,213)					(37,213)
Extinguishment of allocated costs related to repurchase of convertible notes			(1,933)					(1,933)
Bifurcation of conversion option upon issuance of convertible notes, net of issuance costs			147,458					147,458
Issuance of common stock for services	$ 1		9,999					10,000
Issuance of common stock for services (in shares)	770
Proceeds from capped call transactions			57					57
Issuance of common stock under equity plan (in shares)	112
Employee withholding taxes related to stock-based awards			(264)					(264)
Employee withholding taxes related to stock-based awards, (in shares)	(14)
Other comprehensive loss				(99)				(99)
Net income (loss)						(3,632)		(3,632)
Balance at Sep. 30, 2021	$ 30		2,300,396	(2,964)		(2,453,492)		(156,030)
Balance (in shares) at Sep. 30, 2021	29,547
Balance at Dec. 31, 2021	$ 30		2,308,653	(2,873)		(2,489,772)		(183,962)
Balance (in shares) at Dec. 31, 2021	29,573
Stock-based compensation			21,052					21,052
Issuance of common stock under equity plan (in shares)	520
Employee withholding taxes related to stock-based awards			(480)					(480)
Employee withholding taxes related to stock-based awards, (in shares)	(35)
Net proceeds from exercise of stock options			433					$ 433
Net proceeds from exercise of stock options (in shares)	29							29
Issuance of common stock for repurchase of convertible notes	$ 11		209,380					$ 209,391
Issuance of common stock for repurchase of convertible notes (shares)	11,330
Other comprehensive loss				(5,096)				(5,096)
Net income (loss)						242,641		242,641
Balance at Sep. 30, 2022	$ 41	$ (307,371)	2,231,667	(7,969)	$ 131,068	(2,116,063)	$ (176,303)	107,676
Balance (in shares) at Sep. 30, 2022	41,417
Balance at Jun. 30, 2022	$ 30		2,016,201	(2,548)		(2,383,516)		(369,833)
Balance (in shares) at Jun. 30, 2022	29,798
Stock-based compensation			5,788					5,788
Issuance of common stock under equity plan (in shares)	269
Employee withholding taxes related to stock-based awards			(135)					(135)
Employee withholding taxes related to stock-based awards, (in shares)	(9)
Net proceeds from exercise of stock options			433					433
Net proceeds from exercise of stock options (in shares)	29
Issuance of common stock for repurchase of convertible notes	$ 11		209,380					209,391
Issuance of common stock for repurchase of convertible notes (shares)	11,330
Other comprehensive loss				(5,421)				(5,421)
Net income (loss)						267,453		267,453
Balance at Sep. 30, 2022	$ 41	$ (307,371)	$ 2,231,667	$ (7,969)	$ 131,068	$ (2,116,063)	$ (176,303)	$ 107,676
Balance (in shares) at Sep. 30, 2022	41,417