CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Total
Balance at Dec. 31, 2021	$ 626	$ 706,288	$ (683,134)	$ 23,780
Balance (in shares) at Dec. 31, 2021	62,628,855
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options and warrants	$ 1	413		414
Exercise of stock options and warrants (in shares)	101,160
Stock-based compensation		3,892		3,892
Net loss			(33,011)	(33,011)
Balance at Mar. 31, 2022	$ 627	710,593	(716,145)	(4,925)
Balance (in shares) at Mar. 31, 2022	62,730,015
Balance at Dec. 31, 2022	$ 628	720,773	(635,717)	85,684
Balance (in shares) at Dec. 31, 2022	62,828,765
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation		2,953		2,953
Net loss			(33,701)	(33,701)
Balance at Mar. 31, 2023	$ 628	$ 723,726	$ (669,418)	$ 54,936
Balance (in shares) at Mar. 31, 2023	62,828,765