CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Total
Balance at Dec. 31, 2022	$ 68	$ 544,372	$ (537,960)	$ 6,480
Balance (in shares) at Dec. 31, 2022	6,836,735
Increase (Decrease) in Stockholders' Equity
Stock compensation accrued (Note 14)		405		405
Shares issued under the at-the-market offering agreement, net (Note 14)	$ 3	1,791		1,794
Shares issued under the at-the-market offering agreement, net (Note 14) (in shares)	308,930
Offering and private placement transaction (Note 14)	$ 8	1,847		1,855
Offering and private placement transaction (Note 14) (in shares)	790,000
Public offering (Note 14)	$ 47	3,760		3,807
Public offering (Note 14) (in shares)	4,712,488
Warrants exercised (Note 14)	$ 15	(15)
Warrants exercised (Note 14) (in shares)	1,436,527
Net loss			(9,228)	(9,228)
Balance at Dec. 31, 2023	$ 141	552,160	(547,188)	5,113
Balance (in shares) at Dec. 31, 2023	14,084,680
Increase (Decrease) in Stockholders' Equity
Stock compensation accrued and restricted stock awards granted (Note 14)		404		404
Stock compensation accrued and restricted stock awards granted (Note 14) (in shares)	46,426
KELTIP shares issued net of shares relinquished to cover withholding taxes (Note 14)	$ 4	(23)		(19)
KELTIP shares issued net of shares relinquished to cover withholding taxes (Note 14) (in shares)	433,370
Warrants exercised (Note 14)	$ 5	(5)
Warrants exercised (Note 14) (in shares)	488,572
Net loss			(7,600)	(7,600)
Balance at Dec. 31, 2024	$ 150	$ 552,536	$ (554,788)	$ (2,102)
Balance (in shares) at Dec. 31, 2024	15,053,048