Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2022	126,302
Balance at Dec. 31, 2022	$ 13	$ 454,741	$ (302)	$ (272,814)	$ 181,638
Share-based awards, net of tax remittance (in shares)	61
Share-based awards, net of tax remittance	$ 0	0	0	0	0
Stock-based compensation	0	1,267	0	0	1,267
Unrealized (loss) gain on marketable securities	0	0	156	0	156
Net loss	$ 0	0	0	(7,837)	(7,837)
Common stock issued upon exercise of options (in shares)	12
Common stock issued upon exercise of options	$ 0	41	0	0	41
Balance (in shares) at Mar. 31, 2023	126,375
Balance at Mar. 31, 2023	$ 13	456,049	(146)	(280,651)	175,265
Balance (in shares) at Dec. 31, 2023	127,668
Balance at Dec. 31, 2023	$ 13	463,796	37	(315,308)	148,538
Common shares issued, net of issuance costs of $0.5 million (in shares)	9,790
Common shares issued, net of issuance costs of $0.5 million	$ 1	17,568	0	0	17,569
Share-based awards, net of tax remittance (in shares)	131
Share-based awards, net of tax remittance		(136)	0	0	(136)
Stock-based compensation	$ 0	2,003	0	0	2,003
Unrealized (loss) gain on marketable securities	0	0	(127)	0	(127)
Net loss	$ 0	0	0	(10,787)	$ (10,787)
Common stock issued upon exercise of options (in shares)					(0)
Balance (in shares) at Mar. 31, 2024	137,589
Balance at Mar. 31, 2024	$ 14	$ 483,231	$ (90)	$ (326,095)	$ 157,060