CONSOLIDATED STATEMENTS OF STOCKHOLDERS' (DEFICIT) EQUITY (unaudited) - USD ($) shares in Thousands, $ in Thousands	Common Stock	Additional Paid-In Capital	Treasury Stock.	Accumulated Deficit	Accumulated Other Comprehensive Loss	Total
Balance at beginning of period at Dec. 31, 2021	$ 430	$ 144,282	$ (57,166)	$ (36,196)	$ (1,343)	$ 50,007
Balance at beginning of period (in shares) at Dec. 31, 2021	43,024		(6,398)
Net loss attributable to common stockholders				(11,707)		(11,707)
Settlement of stock awards	$ 4		$ (295)			(291)
Settlement of stock awards (in shares)	394		(143)
Unrealized gain on pension liability					356	356
Stock-based compensation		443				443
Balance at ending of period at Sep. 30, 2022	$ 434	144,725	$ (57,461)	(47,903)	(987)	38,808
Balance at ending of period (in shares) at Sep. 30, 2022	43,418		(6,541)
Balance at beginning of period at Jun. 30, 2022	$ 434	144,580	$ (57,461)	(41,550)	(1,106)	44,897
Balance at beginning of period (in shares) at Jun. 30, 2022	43,391		(6,541)
Net loss attributable to common stockholders				(6,353)		(6,353)
Settlement of stock awards (in shares)	27
Unrealized gain on pension liability					119	119
Stock-based compensation		145				145
Balance at ending of period at Sep. 30, 2022	$ 434	144,725	$ (57,461)	(47,903)	(987)	38,808
Balance at ending of period (in shares) at Sep. 30, 2022	43,418		(6,541)
Balance at beginning of period at Dec. 31, 2022	$ 435	144,879	$ (57,461)	(56,886)	(3,626)	27,341
Balance at beginning of period (in shares) at Dec. 31, 2022	43,448		(6,541)
Net loss attributable to common stockholders				(29,044)		(29,044)
Settlement of warrants	$ 8	(5)				3
Settlement of warrants (in shares)	750
Settlement of stock awards	$ 6		$ (176)			(170)
Settlement of stock awards (in shares)	672		(225)
Unrealized gain on pension liability					356	356
Stock-based compensation		354				354
Balance at ending of period at Sep. 30, 2023	$ 449	145,228	$ (57,637)	(85,930)	(3,270)	(1,160)
Balance at ending of period (in shares) at Sep. 30, 2023	44,870		(6,766)
Balance at beginning of period at Jun. 30, 2023	$ 448	145,114	$ (57,637)	(74,042)	(3,389)	10,494
Balance at beginning of period (in shares) at Jun. 30, 2023	44,804		(6,766)
Net loss attributable to common stockholders				(11,888)		(11,888)
Settlement of stock awards	$ 1					1
Settlement of stock awards (in shares)	66
Unrealized gain on pension liability					119	119
Stock-based compensation		114				114
Balance at ending of period at Sep. 30, 2023	$ 449	$ 145,228	$ (57,637)	$ (85,930)	$ (3,270)	$ (1,160)
Balance at ending of period (in shares) at Sep. 30, 2023	44,870		(6,766)