CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands	Scenario, Previously Reported [Member] Common Stock [Member]	Scenario, Previously Reported [Member] Additional Paid-in Capital [Member]	Scenario, Previously Reported [Member] Accumulated Deficit [Member]	Scenario, Previously Reported [Member]	Revision of Prior Period Error Correction Adjustment Accumulated Deficit [Member]	Revision of Prior Period Error Correction Adjustment	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Total
Increase (Decrease) in Stockholders' Equity
Adjustment related to correction of immaterial error (Note 4)					$ (93)	$ (93)
Balance at Dec. 31, 2021	$ 1,628	$ 540,518	$ (527,961)	$ 14,185			$ 1,628	$ 540,518	$ (528,054)	$ 14,092
Balance (in shares) at Dec. 31, 2021	162,804,612						162,804,612
Increase (Decrease) in Stockholders' Equity
Stock compensation accrued (Note 16)								149		149
KELTIP shares issued net of shares relinquished to cover withholding taxes (Note 16)							$ 11	(240)		(229)
KELTIP shares issued net of shares relinquished to cover withholding taxes (Note 16) (in shares)							1,123,380
Net loss									(316)	(316)
Balance at Mar. 31, 2022							$ 1,639	540,427	(528,370)	13,696
Balance (in shares) at Mar. 31, 2022							163,927,992
Balance at Dec. 31, 2022							$ 1,703	542,737	(537,960)	6,480
Balance (in shares) at Dec. 31, 2022							170,258,853
Increase (Decrease) in Stockholders' Equity
Stock compensation accrued (Note 16)								189		189
Shares issued under the at-the-market offering agreement, net (Note 16)							$ 27	651		678
Shares issued under the at-the-market offering agreement, net (Note 16) (in shares)							2,749,976
Net loss									(3,266)	(3,266)
Balance at Mar. 31, 2023							$ 1,730	$ 543,577	$ (541,226)	$ 4,081
Balance (in shares) at Mar. 31, 2023							173,008,829