Condensed Consolidated Statements of Stockholders' Deficit (unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive (loss) Income [Member]	Accumulated Deficit [Member]
Beginning balance at Dec. 31, 2021	$ (79,673)	$ 8	$ 1,098,776	$ 191	$ (1,178,648)
Beginning balance,Shares at Dec. 31, 2021		75,746,000
Vesting of restricted stock (in shares)		673,000
Exercise of stock options and shares issued under the employee stock purchase plan	2,802		2,802
Exercise of stock options and shares issued under the employee stock purchase plan, (shares)		438,000
Stock-based compensation expense	22,429		22,429
Issuance of common stock, net of issuance costs	29,294		29,294
Issuance of common stock, net of issuance costs (in Shares)		2,941,000
Unrealized loss on investments	(184)			(184)
Foreign currency translation adjustment	(545)			(545)
Net Income (Loss)	(90,461)				(90,461)
Ending balance at Jun. 30, 2022	(116,338)	$ 8	1,153,301	(538)	(1,269,109)
Ending balance,Shares at Jun. 30, 2022		79,798,000
Beginning balance at Mar. 31, 2022	(83,079)	$ 8	1,136,873	87	(1,220,047)
Beginning balance,Shares at Mar. 31, 2022		79,419,000
Vesting of restricted stock (in shares)		108,000
Exercise of stock options and shares issued under the employee stock purchase plan	1,335		1,335
Exercise of stock options and shares issued under the employee stock purchase plan, (shares)		271,000
Stock-based compensation expense	15,093		15,093
Unrealized loss on investments	(170)			(170)
Foreign currency translation adjustment	(455)			(455)
Net Income (Loss)	(49,062)				(49,062)
Ending balance at Jun. 30, 2022	(116,338)	$ 8	1,153,301	(538)	(1,269,109)
Ending balance,Shares at Jun. 30, 2022		79,798,000
Beginning balance at Dec. 31, 2022	(16,656)	$ 12	1,327,909	638	(1,343,939)
Beginning balance,Shares at Dec. 31, 2022		113,213,000
Vesting of restricted stock (in shares)		836,000
Exercise of stock options and shares issued under the employee stock purchase plan	860		860
Exercise of stock options and shares issued under the employee stock purchase plan, (shares)		291,000
Stock-based compensation expense	11,449		11,449
Unrealized loss on investments	(264)			(264)
Foreign currency translation adjustment	119			119
Net Income (Loss)	(66,756)				(66,756)
Ending balance at Jun. 30, 2023	(71,248)	$ 12	1,340,218	(783)	(1,410,695)
Ending balance,Shares at Jun. 30, 2023		114,340,000
Beginning balance at Mar. 31, 2023	(45,174)	$ 12	1,333,298	(419)	(1,378,065)
Beginning balance,Shares at Mar. 31, 2023		113,971,000
Vesting of restricted stock (in shares)		78,000
Exercise of stock options and shares issued under the employee stock purchase plan	860		860
Exercise of stock options and shares issued under the employee stock purchase plan, (shares)		291,000
Stock-based compensation expense	6,060		6,060
Unrealized loss on investments	(297)			(297)
Foreign currency translation adjustment	(67)			(67)
Net Income (Loss)	(32,630)				(32,630)
Ending balance at Jun. 30, 2023	$ (71,248)	$ 12	$ 1,340,218	$ (783)	$ (1,410,695)
Ending balance,Shares at Jun. 30, 2023		114,340,000