CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Unaudited) - 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	[1]	$ 542,081	$ (527,961)	$ 14,185			$ 65	[1]	$ 542,081	$ (528,054)	$ 14,092
Balance (in shares) at Dec. 31, 2021	[1]	6,538,566							6,538,566
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)									$ 1	[1]	(230)		(229)
KELTIP shares issued net of shares relinquished to cover withholding taxes (Note 16) (in shares)	[1]								44,935
Net loss												(316)	(316)
Balance at Mar. 31, 2022									$ 66	[1]	542,000	(528,370)	13,696
Balance (in shares) at Mar. 31, 2022	[1]								6,583,501
Balance at Dec. 31, 2021		$ 65	[1]	$ 542,081	$ (527,961)	$ 14,185			$ 65	[1]	542,081	(528,054)	14,092
Balance (in shares) at Dec. 31, 2021	[1]	6,538,566							6,538,566
Increase (Decrease) in Stockholders' Equity
Net loss													(5,826)
Balance at Sep. 30, 2022									$ 67	[1]	543,443	(533,880)	9,630
Balance (in shares) at Sep. 30, 2022	[1]								6,725,501
Balance at Mar. 31, 2022									$ 66	[1]	542,000	(528,370)	13,696
Balance (in shares) at Mar. 31, 2022	[1]								6,583,501
Increase (Decrease) in Stockholders' Equity
Stock compensation accrued and restricted stock awards granted (Note 16)											200		200
Stock compensation accrued and restricted stock awards granted (Note 16) (in shares)	[1]								20,000
Warrants exercised (Note 16)									$ 1	[1]	1,049		1,050
Warrants exercised (Note 16) (in shares)	[1]								120,000
Net loss												(2,813)	(2,813)
Balance at Jun. 30, 2022									$ 67	[1]	543,249	(531,183)	12,133
Balance (in shares) at Jun. 30, 2022	[1]								6,723,501
Increase (Decrease) in Stockholders' Equity
Stock compensation accrued and restricted stock awards granted (Note 16)											194		194
Stock compensation accrued and restricted stock awards granted (Note 16) (in shares)	[1]								2,000
Net loss												(2,697)	(2,697)
Balance at Sep. 30, 2022									$ 67	[1]	543,443	(533,880)	9,630
Balance (in shares) at Sep. 30, 2022	[1]								6,725,501
Balance at Dec. 31, 2022									$ 68	[1]	544,372	(537,960)	6,480
Balance (in shares) at Dec. 31, 2022	[1]								6,836,735
Increase (Decrease) in Stockholders' Equity
Stock compensation accrued (Note 16)											189		189
Shares issued under the at-the-market offering agreement, net (Note 16)									$ 1	[1]	677		678
Shares issued under the at-the-market offering agreement, net (Note 16) (in shares)	[1]								109,999
Net loss												(3,266)	(3,266)
Balance at Mar. 31, 2023									$ 69	[1]	545,238	(541,226)	4,081
Balance (in shares) at Mar. 31, 2023	[1]								6,946,734
Balance at Dec. 31, 2022									$ 68	[1]	544,372	(537,960)	6,480
Balance (in shares) at Dec. 31, 2022	[1]								6,836,735
Increase (Decrease) in Stockholders' Equity
Net loss													(7,931)
Balance at Sep. 30, 2023									$ 86	[1]	548,328	(545,891)	2,523
Balance (in shares) at Sep. 30, 2023	[1]								8,573,252
Balance at Mar. 31, 2023									$ 69	[1]	545,238	(541,226)	4,081
Balance (in shares) at Mar. 31, 2023	[1]								6,946,734
Increase (Decrease) in Stockholders' Equity
Stock compensation accrued (Note 16)											43		43
Shares issued under the at-the-market offering agreement, net (Note 16)									$ 2	[1]	1,115		1,117
Shares issued under the at-the-market offering agreement, net (Note 16) (in shares)	[1]								198,931
Offering and private placement transaction (Note 16)									$ 8	[1]	1,847		1,855
Offering and private placement transaction (Note 16) (in shares)	[1]								790,000
Net loss												(1,488)	(1,488)
Balance at Jun. 30, 2023									$ 79	[1]	548,243	(542,714)	5,608
Balance (in shares) at Jun. 30, 2023	[1]								7,935,665
Increase (Decrease) in Stockholders' Equity
Stock compensation accrued (Note 16)											92		92
Warrants exercised (Note 16)									$ 7	[1]	(7)
Warrants exercised (Note 16) (in shares)	[1]								637,587
Net loss												(3,177)	(3,177)
Balance at Sep. 30, 2023									$ 86	[1]	$ 548,328	$ (545,891)	$ 2,523
Balance (in shares) at Sep. 30, 2023	[1]								8,573,252

[1] (1) Reflects the one-for-25 reverse stock split that became effective June 9, 2023. Refer to Note 1, “Basis of Preparation of Financial Statements and Nature of Operations.”