Consolidated Statements of Changes in Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock Outstanding [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2021	100,832
Balance at Dec. 31, 2021	$ 10	$ 373,657	$ 0	$ (233,589)	$ 140,078
Common shares issued in PIPE Offering, net (in shares)	25,000
Common shares issued in PIPE Offering, net	$ 3	75,739	0	0	$ 75,742
Common stock issued upon exercise of options (in shares)	6				6
Common stock issued upon exercise of options	$ 0	15	0	0	$ 15
Share-based awards (in shares)	559
Share-based awards	$ 0	0	0	0	0
Stock-based compensation	$ 0	5,330	0	0	5,330
Cancelled shares (in shares)	(95)
Unrealized gain (loss) on marketable securities	$ 0	0	(302)	0	(302)
Net loss	$ 0	0	0	(39,225)	(39,225)
Balance (in shares) at Dec. 31, 2022	126,302
Balance at Dec. 31, 2022	$ 13	454,741	(302)	(272,814)	181,638
Common shares issued in PIPE Offering, net (in shares)	952
Common shares issued in PIPE Offering, net	$ 0	3,032	0	0	$ 3,032
Common stock issued upon exercise of options (in shares)	29				29
Common stock issued upon exercise of options	$ 0	62	0	0	$ 62
Share-based awards (in shares)	385
Share-based awards	$ 0	(159)	0	0	(159)
Stock-based compensation	0	6,120	0	0	6,120
Unrealized gain (loss) on marketable securities	0	0	339	0	339
Net loss	$ 0	0	0	(42,494)	(42,494)
Balance (in shares) at Dec. 31, 2023	127,668
Balance at Dec. 31, 2023	$ 13	$ 463,796	$ 37	$ (315,308)	$ 148,538