Condensed Consolidated Statements of Stockholders' Equity (Deficit) (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balances (in shares) at Dec. 31, 2022	74,759,591
Balances at Dec. 31, 2022	$ 7	$ 196,246	$ (193,219)	$ 203	$ 3,237
Stock-based compensation expense	0	2,223	0	0	2,223
Unrealized loss on available-for-sale securities	0	0	0	14	14
Foreign currency translation adjustments	0	0	0	4	4
Net loss	$ 0	0	(11,770)	0	(11,770)
Issuance of common stock (in shares)	3,227,758
Issuance of common stock	$ 1	4,664	0	0	4,665
Balances (in shares) at Mar. 31, 2023	77,987,349
Balances at Mar. 31, 2023	$ 8	203,133	(204,989)	221	(1,627)
Balances (in shares) at Dec. 31, 2023	128,422,851
Balances at Dec. 31, 2023	$ 13	255,901	(242,723)	199	13,390
Stock-based compensation expense	$ 0	2,013	0	0	2,013
Issuance of common stock upon vesting of restricted stock awards (in shares)	10,870
Issuance of common stock upon vesting of restricted stock awards	$ 0	0	0	0	0
Unrealized loss on available-for-sale securities	0	0	0	(4)	(4)
Foreign currency translation adjustments	0	0	0	(55)	(55)
Net loss	$ 0	0	(11,080)	0	(11,080)
Balances (in shares) at Mar. 31, 2024	128,433,721
Balances at Mar. 31, 2024	$ 13	$ 257,914	$ (253,803)	$ 140	$ 4,264