Consolidated Statements Of Shareholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Total
Balance at Dec. 31, 2018	$ 6,717	$ 72,358	$ (37,827)	$ 68,579	$ 109,827
Balance, Shares at Dec. 31, 2018	67,168,000
Balance, Treasury Shares at Dec. 31, 2018			(7,572,000)
Shares issued - stock-based compensation	$ 50	206			256
Shares issued - stock-based compensation, Shares	(506,000)		(10,000)
Stock-based compensation expense		985			985
Treasury stock			$ (3,602)	(309)	(3,911)
Treasury stock, Shares			(2,067,000)
Net income				2,563	2,563
Balance at Dec. 31, 2019	$ 6,767	73,549	$ (41,429)	70,833	109,720
Balance, Shares at Dec. 31, 2019	67,674,000		(9,649,000)
Shares issued - stock-based compensation	$ 23	40			63
Shares issued - stock-based compensation, Shares	(223,000)		(44,000)
Stock-based compensation expense		848			848
Treasury stock			$ (992)		(992)
Treasury stock, Shares			(673,000)
Net income				(48,181)	(48,181)
Balance at Dec. 31, 2020	$ 6,790	74,437	$ (42,421)	22,652	$ 61,458
Balance, Shares at Dec. 31, 2020	67,897,000
Balance, Treasury Shares at Dec. 31, 2020			(10,366,000)		(10,366,376)
Shares issued - stock-based compensation	$ 166	1,203			$ 1,369
Shares issued - stock-based compensation, Shares	(1,665,000)		(573,000)
Stock-based compensation expense		1,060			1,060
Treasury stock			$ (1,426)		(1,426)
Net income				81,836	81,836
Balance at Dec. 31, 2021	$ 6,956	$ 76,700	$ (43,847)	$ 104,488	$ 144,297
Balance, Shares at Dec. 31, 2021	69,562,000
Balance, Treasury Shares at Dec. 31, 2021			(10,939,000)		(10,939,323)