Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock Private placement	Common Stock	Additional Paid-in-Capital Private placement	Additional Paid-in-Capital	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Accumulated Deficit	Private placement	Total
Balance at Dec. 31, 2020		$ 4,740		$ 3,446,650	$ 2,451	$ (40,434)	$ (1,946,488)		$ 1,466,919
Balance (in shares) at Dec. 31, 2020		473,977,469				15,926,068
Increase (Decrease) in Stockholders' Equity
Net loss							(60,746)		(60,746)
Other comprehensive (loss) gain					(1,031)				(1,031)
Stock-based compensation				9,695					9,695
Stock-based compensation (in shares)		15,166
Issuance of common stock, net	$ 549	$ 322	$ 1,564,088	2,022,866				$ 1,564,637	2,023,188
Issuance of common stock, net (in shares)	54,966,188	32,200,000
Stock option exercises		$ 18		4,691					4,709
Stock option exercises (in shares)		1,758,375
Exercise of warrants		$ 163		15,282					15,445
Exercise of warrants (in shares)		16,308,978
Provision for common stock warrants				1,601					1,601
Conversion of 3.75% Convertible Senior Note		$ 30		15,155					15,185
Conversion of 3.75% Convertible Senior Note (in shares)		3,016,036
Repurchase of 5.5% Convertible Senior Notes, net of income tax benefit		$ 1		159					160
Repurchase of 5.5% Convertible Senior Notes, net of income tax benefit (in shares)		69,808
Balance (ASU 2020-06) at Mar. 31, 2021				(130,249)			9,550		(120,699)
Balance at Mar. 31, 2021		$ 5,823		6,949,938	1,420	$ (40,434)	(1,997,684)		4,919,063
Balance (in shares) at Mar. 31, 2021		582,312,020				15,926,068
Balance at Dec. 31, 2020		$ 4,740		3,446,650	2,451	$ (40,434)	(1,946,488)		1,466,919
Balance (in shares) at Dec. 31, 2020		473,977,469				15,926,068
Increase (Decrease) in Stockholders' Equity
Net loss									$ (267,051)
Stock option exercises (in shares)									0
Balance (ASU 2020-06) at Sep. 30, 2021							1		$ 1
Balance at Sep. 30, 2021		$ 5,930		6,978,454	(2,338)	$ (71,168)	(2,203,989)		4,706,889
Balance (in shares) at Sep. 30, 2021		593,077,995				17,032,648
Balance (ASU 2020-06) at Mar. 31, 2021				(130,249)			9,550		(120,699)
Balance at Mar. 31, 2021		$ 5,823		6,949,938	1,420	$ (40,434)	(1,997,684)		4,919,063
Balance (in shares) at Mar. 31, 2021		582,312,020				15,926,068
Increase (Decrease) in Stockholders' Equity
Net loss							(99,634)		(99,634)
Other comprehensive (loss) gain					(1,386)				(1,386)
Stock-based compensation				11,120					11,120
Stock option exercises				(4)					(4)
Stock option exercises (in shares)		2,075
Exercise of warrants		$ 45		(40)					5
Exercise of warrants (in shares)		4,534,130
Provision for common stock warrants				1,642					1,642
Balance (ASU 2020-06) at Jun. 30, 2021				64			(1)		63
Balance at Jun. 30, 2021		$ 5,868		6,962,720	34	$ (40,434)	(2,097,319)		4,830,869
Balance (in shares) at Jun. 30, 2021		586,848,225				15,926,068
Increase (Decrease) in Stockholders' Equity
Net loss							(106,671)		(106,671)
Other comprehensive (loss) gain					(2,372)				(2,372)
Stock-based compensation				13,998					13,998
Stock-based compensation (in shares)		46,242
Issuance of common stock, net				5					5
Stock option exercises		$ 28		583		$ (30,734)			(30,123)
Stock option exercises (in shares)		2,815,652				1,106,580
Exercise of warrants		$ 34		(39)					(5)
Exercise of warrants (in shares)		3,367,876
Provision for common stock warrants				1,187					1,187
Balance (ASU 2020-06) at Sep. 30, 2021							1		1
Balance at Sep. 30, 2021		$ 5,930		6,978,454	(2,338)	$ (71,168)	(2,203,989)		4,706,889
Balance (in shares) at Sep. 30, 2021		593,077,995				17,032,648
Balance at Dec. 31, 2021		$ 5,947		7,070,710	(1,532)	$ (72,526)	(2,396,903)		$ 4,605,696
Balance (in shares) at Dec. 31, 2021		594,729,610				17,074,710			594,729,610
Increase (Decrease) in Stockholders' Equity
Net loss							(156,489)		$ (156,489)
Other comprehensive (loss) gain					(16,930)				(16,930)
Stock-based compensation		$ 2		43,384					43,386
Stock-based compensation (in shares)		226,221
Stock option exercises and issuance of shares of restricted common stock		$ 3		288					291
Stock option exercises and issuance of shares of restricted common stock (in shares)		253,525
Treasury stock acquired from employees upon exercise of stock options and vesting of restricted stock						$ (1,465)			(1,465)
Treasury stock acquired from employees upon exercise of stock options and vesting of restricted stock (in shares)						71,627
Provision for common stock warrants				1,743					1,743
Balance at Mar. 31, 2022		$ 5,952		7,116,125	(18,462)	$ (73,991)	(2,553,392)		4,476,232
Balance (in shares) at Mar. 31, 2022		595,209,356				17,146,337
Balance at Dec. 31, 2021		$ 5,947		7,070,710	(1,532)	$ (72,526)	(2,396,903)		$ 4,605,696
Balance (in shares) at Dec. 31, 2021		594,729,610				17,074,710			594,729,610
Increase (Decrease) in Stockholders' Equity
Net loss									$ (500,543)
Stock option exercises (in shares)									0
Balance at Sep. 30, 2022		$ 5,988		7,245,396	(35,025)	$ (95,337)	(2,897,446)		$ 4,223,576
Balance (in shares) at Sep. 30, 2022		598,777,468				18,015,881			598,777,468
Balance at Mar. 31, 2022		$ 5,952		7,116,125	(18,462)	$ (73,991)	(2,553,392)		$ 4,476,232
Balance (in shares) at Mar. 31, 2022		595,209,356				17,146,337
Increase (Decrease) in Stockholders' Equity
Net loss							(173,296)		(173,296)
Other comprehensive (loss) gain					(10,527)				(10,527)
Stock-based compensation		$ 2		44,857					44,859
Stock-based compensation (in shares)		108,216
Stock option exercises and issuance of shares of restricted common stock		$ 4		525					529
Stock option exercises and issuance of shares of restricted common stock (in shares)		391,967
Treasury stock acquired from employees upon exercise of stock options and vesting of restricted stock						$ (1,195)			(1,195)
Treasury stock acquired from employees upon exercise of stock options and vesting of restricted stock (in shares)						63,712
Provision for common stock warrants				1,979					1,979
Balance at Jun. 30, 2022		$ 5,958		7,163,486	(28,989)	$ (75,186)	(2,726,688)		4,338,581
Balance (in shares) at Jun. 30, 2022		595,709,539				17,210,049
Increase (Decrease) in Stockholders' Equity
Net loss							(170,758)		(170,758)
Other comprehensive (loss) gain					(6,036)				(6,036)
Stock-based compensation		$ 1		46,738					46,739
Stock-based compensation (in shares)		113,352
Stock option exercises and issuance of shares of restricted common stock		$ 29		1,286					1,315
Stock option exercises and issuance of shares of restricted common stock (in shares)		2,954,577
Treasury stock acquired from employees upon exercise of stock options and vesting of restricted stock						$ (20,151)			(20,151)
Treasury stock acquired from employees upon exercise of stock options and vesting of restricted stock (in shares)						805,832
Provision for common stock warrants				33,886					33,886
Balance at Sep. 30, 2022		$ 5,988		$ 7,245,396	$ (35,025)	$ (95,337)	$ (2,897,446)		$ 4,223,576
Balance (in shares) at Sep. 30, 2022		598,777,468				18,015,881			598,777,468