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
Balance at Dec. 31, 2020		$ 383	$ 135,978	$ (56,791)	$ (15,391)	$ (2,159)
Balance (in shares) at Dec. 31, 2020		38,345		(6,173)
Net income (loss) attributable to common stockholders					(7,419)
Settlement of stock awards		$ 5		$ (375)
Settlement of stock awards (in shares)		496		(225)
Unrealized gain (loss) on pension liability						119
Stock-based compensation expense			173
Balance at Mar. 31, 2021		$ 388	136,151	$ (57,166)	(22,810)	(2,040)
Balance (in shares) at Mar. 31, 2021		38,841		(6,398)
Balance at Dec. 31, 2020		$ 383	135,978	$ (56,791)	(15,391)	(2,159)
Balance (in shares) at Dec. 31, 2020		38,345		(6,173)
Balance at Dec. 31, 2021	[1]	$ 430	144,282	$ (57,166)	(36,196)	(1,343)
Balance (in shares) at Dec. 31, 2021	[1]	43,024		(6,398)
Net income (loss) attributable to common stockholders					(5,131)
Settlement of stock awards		$ 4		$ (295)
Settlement of stock awards (in shares)		364		(153)
Unrealized gain (loss) on pension liability						119
Stock-based compensation expense			169
Balance at Mar. 31, 2022	[1]	$ 434	$ 144,451	$ (57,461)	$ (41,327)	$ (1,224)
Balance (in shares) at Mar. 31, 2022	[1]	43,388		(6,551)

[1] Amounts are Restated. See Note 3 for more information.