CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands	Scenario, Previously Reported Common Stock	Scenario, Previously Reported Additional Paid-in Capital	Scenario, Previously Reported Accumulated Deficit	Scenario, Previously Reported	Revision of Prior Period Error Correction Adjustment Accumulated Deficit	Revision of Prior Period Error Correction Adjustment	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Total
Increase (Decrease) in Stockholders' Equity
Adjustment related to correction of immaterial error (Note 4)					$ (93)	$ (93)
Balance at Dec. 31, 2021	$ 65	$ 542,081	$ (527,961)	$ 14,185			$ 65	$ 542,081	$ (528,054)	$ 14,092
Balance (in shares) at Dec. 31, 2021	6,538,566						6,538,566
Increase (Decrease) in Stockholders' Equity
Shares issued under the at-the-market offering agreement, net (Note 16)							$ 1	727		728
Shares issued under the at-the-market offering agreement, net (Note 16) (in shares)							111,234
Stock compensation accrued and restricted stock awards granted (Note 16)								744		744
Stock compensation accrued and restricted stock awards granted (Note 16) (in shares)							22,000
Warrants exercised (Note 16)							$ 1	1,049		1,050
Warrants exercised (Note 16) (in shares)							120,000
KELTIP shares issued net of shares relinquished to cover withholding taxes (Note 16)							$ 1	(229)		(228)
KELTIP shares issued net of shares relinquished to cover withholding taxes (Note 16) (in shares)							44,935
Net Income (Loss)									(9,906)	(9,906)
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 16)								405		405
Shares issued under the at-the-market offering agreement, net (Note 16)							$ 3	1,791		1,794
Shares issued under the at-the-market offering agreement, net (Note 16) (in shares)							308,930
Public offering (Note 16)							$ 47	3,760		3,807
Public offering (Note 16) (in shares)							4,712,488
Warrants exercised (Note 16)							$ 15	(15)
Warrants exercised (Note 16) (in shares)							1,436,527
Offering and private placement transaction (Note 16)							$ 8	1,847		1,855
Offering and private placement transaction (Note 16) (in shares)							790,000
Net Income (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