CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common stock	Additional paid-in capital	Accumulated deficit	Accumulated other comprehensive income (loss)
Beginning balance (shares) at Dec. 31, 2019		9,120,078
Beginning balance at Dec. 31, 2019	$ 17,575	$ 1	$ 328,156	$ (310,587)	$ 5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive loss	(255,573)			(255,568)	(5)
Exercise of options, vesting of restricted stock units and shares under employee stock purchase plan (in shares)		367,269
Exercise of options, vesting of restricted stock units and shares issued under employee stock purchase plan	554		554
Stock-based compensation	18,100		18,100
Deemed dividend to warrants holders due to warrant modification	0		41	(41)
Classification of stock awards to derivative liability	(975)		(975)
Issuance of common stock, net of issuance costs (in shares)		8,951,875
Issuance of common stock, net of issuance costs	61,642	$ 1	61,641
Issuance of stock related to merger (in shares)		24,765,999
Issuance of stock related to merger	$ 196,170	$ 2	196,168
Ending balance (shares) at Dec. 31, 2020	43,205,221	43,205,221
Ending balance at Dec. 31, 2020	$ 37,493	$ 4	603,685	(566,196)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive loss	(73,329)			(73,329)	0
Exercise of options, vesting of restricted stock units and shares under employee stock purchase plan (in shares)		364,937
Exercise of options, vesting of restricted stock units and shares issued under employee stock purchase plan	410		410
Stock-based compensation	8,080		8,080
Issuance of common stock, net of issuance costs (in shares)		10,007,586
Issuance of common stock, net of issuance costs	$ 75,982	$ 1	75,981
Ending balance (shares) at Dec. 31, 2021	53,577,744	53,577,744
Ending balance at Dec. 31, 2021	$ 48,636	$ 5	$ 688,156	$ (639,525)	$ 0