CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Treasury Stock, at Cost
Beginning balance (in shares) at Dec. 31, 2019		20,067
Beginning balance, treasury shares (in shares) at Dec. 31, 2019					284
Beginning balance at Dec. 31, 2019	$ 178,255	$ 20	$ 345,234	$ (164,010)	$ (2,989)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	540		540
Purchases of treasury stock (in shares)					1,200
Purchases of treasury stock	(10,380)				$ (10,380)
Retirement of treasury stock (in shares)		(1,481)			(1,481)
Retirement of treasury stock	0	$ (1)	(13,338)		$ 13,339
Distribution to noncontrolling interest	(146)		(146)
Net income	$ 10,001			10,001
Ending balance (in shares) at Dec. 31, 2020	18,586	18,586
Ending balance, treasury shares (in shares) at Dec. 31, 2020	3				3
Ending balance at Dec. 31, 2020	$ 178,270	$ 19	332,290	(154,009)	$ (30)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	108		108
Exercise of restricted stock units (in shares)		1
Withholding taxes paid on issued restricted stock units	(6)		(6)
Purchases of treasury stock (in shares)					273
Purchases of treasury stock	(2,594)				$ (2,594)
Retirement of treasury stock (in shares)		(275)			(275)
Retirement of treasury stock	0	$ (1)	(2,609)		$ 2,610
Distribution to noncontrolling interest	(92)		(92)
Net income	$ 32,910			32,910
Ending balance (in shares) at Dec. 31, 2021	18,312	18,312
Ending balance, treasury shares (in shares) at Dec. 31, 2021	1				1
Ending balance at Dec. 31, 2021	$ 208,596	$ 18	$ 329,691	$ (121,099)	$ (14)