Condensed Consolidated Statements of Equity - Unaudited - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Treasury Stock
Balance at beginning of period (in shares) at Dec. 31, 2020		18,586,000
Balance at beginning of period at Dec. 31, 2020	$ 178,270	$ 19	$ 332,290	$ (154,009)	$ (30)
Balance at beginning of period, treasury stock (in shares) at Dec. 31, 2020					3,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	42		42
Purchases of treasury stock (in shares)					107,000
Purchases of treasury stock	(986)				$ (986)
Retirement of treasury stock (in shares)		(104,000)			(104,000)
Retirement of treasury stock	(1)	$ (1)	(959)		$ 959
Net income (loss)	532			532
Balance at end of period (in shares) at Mar. 31, 2021		18,482,000
Balance at end of period at Mar. 31, 2021	$ 177,857	$ 18	331,373	(153,477)	$ (57)
Balance at end of period, treasury stock (in shares) at Mar. 31, 2021					6,000
Balance at beginning of period (in shares) at Dec. 31, 2021	18,312,000	18,312,000
Balance at beginning of period at Dec. 31, 2021	$ 208,596	$ 18	329,691	(121,099)	$ (14)
Balance at beginning of period, treasury stock (in shares) at Dec. 31, 2021	1,000				1,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	$ 566		566
Purchases of treasury stock (in shares)					11,000
Purchases of treasury stock	(129)				$ (129)
Net income (loss)	$ (1,531)			(1,531)
Balance at end of period (in shares) at Mar. 31, 2022	18,312,000	18,312,000
Balance at end of period at Mar. 31, 2022	$ 207,502	$ 18	$ 330,257	$ (122,630)	$ (143)
Balance at end of period, treasury stock (in shares) at Mar. 31, 2022	12,000				12,000