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
Balance at Dec. 31, 2020							$ 1,575	$ 536,263	$ (525,866)	$ 11,972
Balance (in shares) at Dec. 31, 2020							157,512,652
Increase (Decrease) in Stockholders' Equity
Shares issued under the at-the-market offering agreement, net (Note 16)							$ 19	1,681		1,700
Shares issued under the at-the-market offering agreement, net (Note 16) (in shares)							1,856,960
Stock compensation accrued and restricted stock awards granted (Note 16)							$ 3	1,590		1,593
Stock compensation accrued and restricted stock awards granted (Note 16) (in shares)							335,000
Warrants exercised (Note 16)							$ 31	984		1,015
Warrants exercised (Note 16) (in shares)							3,100,000
Net loss									(2,095)	(2,095)
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
Adjustment related to correction of immaterial error (Note 4)					$ (93)	$ (93)
Shares issued under the at-the-market offering agreement, net (Note 16)							$ 28	700		728
Shares issued under the at-the-market offering agreement, net (Note 16) (in shares)							2,780,861
Stock compensation accrued and restricted stock awards granted (Note 16)							$ 6	738		744
Stock compensation accrued and restricted stock awards granted (Note 16) (in shares)							550,000
Warrants exercised (Note 16)							$ 30	1,020		1,050
Warrants exercised (Note 16) (in shares)							3,000,000
KELTIP shares issued net of shares relinquished to cover withholding taxes (Note 16)							$ 11	(239)		(228)
KELTIP shares issued net of shares relinquished to cover withholding taxes (Note 16) (in shares)							1,123,380
Net loss									(9,906)	(9,906)
Balance at Dec. 31, 2022							$ 1,703	$ 542,737	$ (537,960)	$ 6,480
Balance (in shares) at Dec. 31, 2022							170,258,853