CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2020	$ 33	$ 21,219	$ 394,386	$ (165)	$ (328,562)	$ 86,911
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	0	0	15,950	0	0	15,950
Foreign currency translation	0	0	0	10	0	10
Dividends declared	0	0	(548)	0	0	(548)
Stock based compensation expense	0	1,166	0	0	0	1,166
Purchase of treasury stock	0	0	0	0	(1,814)	(1,814)
Balance at Mar. 31, 2021	33	22,385	409,788	(155)	(330,376)	101,675
Balance at Dec. 31, 2021	33	28,753	410,333	(177)	(345,062)	93,880
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	0	0	17,454	0	0	17,454
Foreign currency translation	0	0	0	(31)	0	(31)
Dividends declared	0	0	(1,077)	0	0	(1,077)
Stock based compensation expense	0	339	0	0	0	339
Purchase of treasury stock	0	0	0	0	(3,150)	(3,150)
Balance at Mar. 31, 2022	$ 33	$ 29,092	$ 426,710	$ (208)	$ (348,212)	$ 107,415