UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ (DEFICIT) EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2021		177,000,963
Beginning balance at Dec. 31, 2021	$ 74,008	$ 1	$ 1,536,800	$ 6	$ (1,462,799)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock, net of issuance costs (in shares)		4,404,600
Issuance of common stock, net of    issuance costs	7,178	$ 1	7,177
Proceeds from sale of stock under employee stock purchase plan (in shares)		191,146
Proceeds from sale of stock under    employee stock purchase plan	367		367
Stock-based compensation expense	4,536		4,536
Restricted stock unit vesting (in shares)		1,789,326
Net loss	(63,509)				(63,509)
Ending balance (in shares) at Mar. 31, 2022		183,386,035
Ending balance at Mar. 31, 2022	22,580	$ 2	1,548,880	6	(1,526,308)
Beginning balance (in shares) at Dec. 31, 2021		177,000,963
Beginning balance at Dec. 31, 2021	74,008	$ 1	1,536,800	6	(1,462,799)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(34,058)
Ending balance (in shares) at Jun. 30, 2022		183,704,654
Ending balance at Jun. 30, 2022	58,937	$ 2	1,555,788	6	(1,496,859)
Beginning balance (in shares) at Mar. 31, 2022		183,386,035
Beginning balance at Mar. 31, 2022	22,580	$ 2	1,548,880	6	(1,526,308)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	$ 6,841		6,841
Exercise of options (in shares)	142,440
Exercise of options	$ 67
Restricted stock unit vesting (in shares)		176,179
Net loss	29,449				29,449
Ending balance (in shares) at Jun. 30, 2022		183,704,654
Ending balance at Jun. 30, 2022	$ 58,937	$ 2	1,555,788	6	(1,496,859)
Beginning balance (in shares) at Dec. 31, 2022	184,135,714	184,135,714
Beginning balance at Dec. 31, 2022	$ 5,230	$ 2	1,562,247	6	(1,557,025)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Proceeds from sale of stock under employee stock purchase plan (in shares)		103,500
Proceeds from sale of stock under    employee stock purchase plan	34		34
Stock-based compensation expense	2,489		2,489
Restricted stock unit vesting (in shares)		1,596,732
Net loss	(26,878)				(26,878)
Ending balance (in shares) at Mar. 31, 2023		185,835,946
Ending balance at Mar. 31, 2023	$ (19,125)	$ 2	1,564,770	6	(1,583,903)
Beginning balance (in shares) at Dec. 31, 2022	184,135,714	184,135,714
Beginning balance at Dec. 31, 2022	$ 5,230	$ 2	1,562,247	6	(1,557,025)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of options (in shares)	0
Net loss	$ (38,050)
Ending balance (in shares) at Jun. 30, 2023	188,128,869	188,128,869
Ending balance at Jun. 30, 2023	$ (26,807)	$ 2	1,568,260	6	(1,595,075)
Beginning balance (in shares) at Mar. 31, 2023		185,835,946
Beginning balance at Mar. 31, 2023	(19,125)	$ 2	1,564,770	6	(1,583,903)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	3,490		3,490
Restricted stock unit vesting (in shares)		2,292,923
Net loss	$ (11,172)				(11,172)
Ending balance (in shares) at Jun. 30, 2023	188,128,869	188,128,869
Ending balance at Jun. 30, 2023	$ (26,807)	$ 2	$ 1,568,260	$ 6	$ (1,595,075)