CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Total
Balance at Dec. 31, 2020	$ 10	$ 428,704	$ (340,465)	$ 88,249
Balance (in shares) at Dec. 31, 2020	104,902,888
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 0	3,488	0	3,488
Issuance of common stock, net of offering expenses	$ 9	121,135	0	121,144
Issuance of common stock, net of offering expenses (in shares)	90,846,029
Vesting of Restricted Stock Units, net of shares withheld for taxes and retired	$ 1	(61)	0	(60)
Vesting of Restricted Stock Units, net of shares withheld for taxes and retired (in shares)	64,900
Net loss	$ 0	0	(71,648)	(71,648)
Balance at Dec. 31, 2021	$ 20	553,266	(412,113)	141,173
Balance (in shares) at Dec. 31, 2021	195,813,817
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 0	5,215	0	5,215
Issuance of common stock, net of offering expenses	$ 2	64,642	0	64,644
Issuance of common stock, net of offering expenses (in shares)	24,125,873
Vesting of Restricted Stock Units, net of shares withheld for taxes and retired	$ 0	(2,899)	0	(2,899)
Vesting of Restricted Stock Units, net of shares withheld for taxes and retired (in shares)	1,808,561
Warrants issued in connection with note payable	$ 0	9,570	0	9,570
Exercise of stock options	$ 0	175	0	175
Exercise of stock options (in shares)	68,679
Net loss	$ 0	0	(65,904)	(65,904)
Balance at Dec. 31, 2022	$ 22	629,969	(478,017)	151,974
Balance (in shares) at Dec. 31, 2022	221,816,930
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 0	6,187	0	6,187
Vesting of Restricted Stock Units, net of shares withheld for taxes and retired	$ 0	(1,415)	0	(1,415)
Vesting of Restricted Stock Units, net of shares withheld for taxes and retired (in shares)	833,722
Warrants issued in connection with note payable	$ 0	5,595	0	5,595
Exercise of stock options	$ 1	1,103	0	1,104
Exercise of stock options (in shares)	1,444,533
Cashless exercise of warrants	$ 0	0	0	0
Cashless exercise of warrants (in shares)	1,967,847
Net loss	$ 0	0	(28,239)	(28,239)
Balance at Dec. 31, 2023	$ 23	$ 641,439	$ (506,256)	$ 135,206
Balance (in shares) at Dec. 31, 2023	226,063,032