CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Common Stock	Paid-In Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2020		128,138,311
Beginning balance at Dec. 31, 2020	$ 146,379	$ 1,282	$ 643,269	$ 0	$ (498,172)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock, net of issuance costs (in shares)		68,170,579
Issuance of common stock, net of issuance costs	457,447	$ 682	456,765
Issuance of common stock upon exercise of warrants (in shares)		1,866,758
Issuance of common stock upon exercise of warrants	1,121	$ 18	1,103
Non-cash stock-based compensation	7,700		7,700
Stock-based awards and related share issuances, net ( in shares)		3,813,014
Stock-based awards and related share issuances, net	(5,575)	$ 38	(5,613)
Other comprehensive loss	(614)			(614)
Net Loss	$ (59,203)				(59,203)
Ending balance (in shares) at Dec. 31, 2021	201,988,662	201,988,662
Ending balance at Dec. 31, 2021	$ 547,255	$ 2,020	1,103,224	(614)	(557,375)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock and common stock warrants, net of issue costs (in shares)		33,333,336
Issuance of common stock and common stock warrants, net of issuance costs	139,008	$ 333	138,675
Issuance of common stock upon exercise of warrants (in shares)		4,677
Issuance of common stock upon exercise of warrants	3		3
Non-cash stock-based compensation	17,419		17,419
Stock-based awards and related share issuances, net ( in shares)		1,839,950
Stock-based awards and related share issuances, net	225	$ 19	206
Other comprehensive loss	(426)			(426)
Net Loss	$ (98,007)				(98,007)
Ending balance (in shares) at Dec. 31, 2022	237,166,625	237,166,625
Ending balance at Dec. 31, 2022	$ 605,477	$ 2,372	$ 1,259,527	$ (1,040)	$ (655,382)