CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Balance beginning (in shares) at Dec. 31, 2020		71,350,365
Balance beginning at Dec. 31, 2020	$ 627,209	$ 714	$ 2,535,476	$ (1,874,199)	$ (41,806)	$ 7,024
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	106,183		106,183
Stock issued under incentive programs (in shares)		743,019
Issuance of common stock, net of issuance costs	25,201	$ 7	30,593		(5,399)
Issuance of common stock, net of issuance costs (in shares)		2,578,967
Issuance of common stock, net of issuance costs	564,859	$ 26	564,833
Unrealized loss on marketable securities	(9)					(9)
Foreign currency translation adjustment	(2,845)					(2,845)
Net income	(575,036)			(575,036)
Balance ending (in shares) at Jun. 30, 2021		74,672,351
Balance ending at Jun. 30, 2021	745,562	$ 747	3,237,085	(2,449,235)	(47,205)	4,170
Balance beginning (in shares) at Mar. 31, 2021		74,470,583
Balance beginning at Mar. 31, 2021	1,039,127	$ 745	3,180,114	(2,096,918)	(44,457)	(357)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	53,123		53,123
Stock issued under incentive programs (in shares)		201,768
Issuance of common stock, net of issuance costs	1,102	$ 2	3,848		(2,748)
Foreign currency translation adjustment	4,527					4,527
Net income	(352,317)			(352,317)
Balance ending (in shares) at Jun. 30, 2021		74,672,351
Balance ending at Jun. 30, 2021	745,562	$ 747	3,237,085	(2,449,235)	(47,205)	4,170
Balance beginning (in shares) at Dec. 31, 2021		76,433,151
Balance beginning at Dec. 31, 2021	(351,673)	$ 764	3,351,967	(3,617,950)	(85,101)	(1,353)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock, net of issuance costs (in shares)		2,200,000
Issuance of common stock, net of issuance costs			179,000
Balance ending (in shares) at Mar. 31, 2022		78,722,337
Balance ending at Mar. 31, 2022	65,324	$ 787	3,566,292	(3,414,542)	(85,901)	(1,312)
Balance beginning (in shares) at Dec. 31, 2021		76,433,151
Balance beginning at Dec. 31, 2021	(351,673)	$ 764	3,351,967	(3,617,950)	(85,101)	(1,353)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	70,981		70,981
Stock issued under incentive programs (in shares)		145,685
Issuance of common stock, net of issuance costs	951	$ 2	2,303		(1,354)
Issuance of common stock, net of issuance costs (in shares)		2,197,398
Issuance of common stock, net of issuance costs	179,385	$ 22	179,363
Foreign currency translation adjustment	(9,517)					(9,517)
Net income	(307,077)			(307,077)
Balance ending (in shares) at Jun. 30, 2022		78,776,234
Balance ending at Jun. 30, 2022	(416,950)	$ 788	3,604,614	(3,925,027)	(86,455)	(10,870)
Balance beginning (in shares) at Mar. 31, 2022		78,722,337
Balance beginning at Mar. 31, 2022	65,324	$ 787	3,566,292	(3,414,542)	(85,901)	(1,312)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	38,048		38,048
Stock issued under incentive programs (in shares)		53,897
Issuance of common stock, net of issuance costs	(279)	$ 1	274		(554)
Foreign currency translation adjustment	(9,558)					(9,558)
Net income	(510,485)			(510,485)
Balance ending (in shares) at Jun. 30, 2022		78,776,234
Balance ending at Jun. 30, 2022	$ (416,950)	$ 788	$ 3,604,614	$ (3,925,027)	$ (86,455)	$ (10,870)