CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Total	Preferred Stock [Member] Series A Convertible Preferred Stock [Member]
BALANCE at Dec. 31, 2020	$ 141,377	$ 30,512	$ (82,860)	$ 6,203	$ (4,165)	$ 91,067	$ 11,982
BALANCE (in shares) at Dec. 31, 2020	26,476,329						12,700
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	0	0	4,489	0	4,489	$ 0
Preferred stock dividend	0	0	0	(304)	0	(304)
Employee pension plan adjustments	0	0	0	0	(134)	(134)	0
Derivative qualifying as cash flow hedge	0	0	0	0	211	211	0
Stock-based compensation expense
Restricted stock	$ 0	493	0	0	0	493	$ 0
Restricted stock (in shares)	574,614						0
Net share settlement for equity-based compensation	$ 0	(962)	0	0	0	(962)	$ 0
Net share settlement for equity-based compensation (in shares)	(154,973)						0
BALANCE at Mar. 31, 2021	$ 141,377	30,043	(82,860)	10,388	(4,088)	94,860	$ 11,982
BALANCE (in shares) at Mar. 31, 2021	26,895,970						12,700
BALANCE at Dec. 31, 2021	$ 141,377	32,439	(82,860)	39,702	(1,240)	129,418	$ 11,982
BALANCE (in shares) at Dec. 31, 2021	27,000,687						12,700
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	0	0	272	0	272	$ 0
Preferred stock dividend	0	0	0	(304)	0	(304)	0
Employee pension plan adjustments	0	0	0	0	(30)	(30)	0
Derivative qualifying as cash flow hedge	0	0	0	0	0	0	0
Stock-based compensation expense
Restricted stock	$ 0	1,239	0	0	0	1,239	$ 0
Restricted stock (in shares)	528,121						0
Net share settlement for equity-based compensation	$ 0	(1,992)	0	0	0	(1,992)	$ 0
Net share settlement for equity-based compensation (in shares)	(268,654)						0
BALANCE at Mar. 31, 2022	$ 141,377	$ 31,686	$ (82,860)	$ 39,670	$ (1,270)	$ 128,603	$ 11,982
BALANCE (in shares) at Mar. 31, 2022	27,260,154						12,700