CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - 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, 2019	$ 376	$ 134,217	$ (55,731)	$ (19,724)	$ (3,174)	$ 55,964
Balance at beginning of period (in shares) at Dec. 31, 2019	37,612		(5,731)
Net income (loss) available to common stockholders				4,333		4,333
Settlement of stock awards	$ 5		$ (701)			(696)
Settlement of stock awards (in shares)	543		(222)
Unrealized gain (loss) on pension liability					1,015	1,015
Stock-based compensation expense		1,163				1,163
Stock-based consulting fees	$ 2	598				600
Stock-based consulting fees (in shares)	190
Stock buy-back			$ (359)			(359)
Stock buy-back (in shares)			(220)
Balance at ending of period at Dec. 31, 2020	$ 383	135,978	$ (56,791)	(15,391)	(2,159)	62,020
Balance at ending of period (in shares) at Dec. 31, 2020	38,345		(6,173)
Net income (loss) available to common stockholders				(20,805)		(20,805)
Settlement of stock awards	$ 5		$ (375)			(370)
Settlement of stock awards (in shares)	535		(225)
Unrealized gain (loss) on pension liability					816	816
Sale of common stock	$ 42	7,597				7,639
Sale of common stock (in shares)	4,144
Stock-based compensation expense		707				707
Balance at ending of period at Dec. 31, 2021	$ 430	144,282	$ (57,166)	(36,196)	(1,343)	50,007
Balance at ending of period (in shares) at Dec. 31, 2021	43,024		(6,398)
Net income (loss) available to common stockholders				(20,690)		(20,690)
Settlement of stock awards	$ 5		$ (295)			(290)
Settlement of stock awards (in shares)	424		(143)
Unrealized gain (loss) on pension liability					(2,283)	(2,283)
Stock-based compensation expense		597				597
Balance at ending of period at Dec. 31, 2022	$ 435	$ 144,879	$ (57,461)	$ (56,886)	$ (3,626)	$ 27,341
Balance at ending of period (in shares) at Dec. 31, 2022	43,448		(6,541)