Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Repurchased Stock [Member]	Preferred Stock [Member] Mezzanine Equity Series C Convertible Redeemable Preferred Stock [Member]
Beginning Balance at Dec. 31, 2020	$ 116,525	$ 555		$ 288,221	$ (171,770)	$ (481)	$ 13,200
Beginning balance, Shares at Dec. 31, 2020		54,863,000	618,000				4,000,000
Net income	45,746				45,746
Dividend	(396)			(396)
Treasury stock purchases, Value	(888)		$ 593			(888)
Treasury stock purchases, Shares		(593)
Ending Balance at Jun. 30, 2021	160,987	$ 555		287,825	(126,024)	$ (1,369)	$ 13,200
Ending balance, shares at Jun. 30, 2021		54,270,000				1,211,000	4,000,000
Beginning Balance at Mar. 31, 2021	141,552	$ 555		288,023	(146,545)	$ (481)	$ 13,200
Beginning balance, Shares at Mar. 31, 2021		54,863,000	618,000				4,000,000
Net income	20,521				20,521
Dividend	(198)			(198)
Treasury stock purchases, Value	(888)		$ 593			(888)
Treasury stock purchases, Shares		(593)
Ending Balance at Jun. 30, 2021	160,987	$ 555		287,825	(126,024)	$ (1,369)	$ 13,200
Ending balance, shares at Jun. 30, 2021		54,270,000				1,211,000	4,000,000
Beginning Balance at Dec. 31, 2021	205,560	$ 555		287,429	(79,144)	$ (3,280)	$ 13,200
Beginning balance, Shares at Dec. 31, 2021		53,316,000	2,165,000				4,000,000
Net income	24,344				24,344
Dividend	(396)			(396)
Cancellation of stock option	(969)			(969)
Treasury stock purchases, Value	(9,934)		$ 7,300			(9,934)
Treasury stock purchases, Shares		(7,300)
Ending Balance at Jun. 30, 2022	218,605	$ 555		286,064	(54,800)	$ (13,214)	$ 13,200
Ending balance, shares at Jun. 30, 2022		46,016,000				9,465,000	4,000,000
Beginning Balance at Mar. 31, 2022	206,174	$ 555		286,262	(69,881)	$ (10,762)	$ 13,200
Beginning balance, Shares at Mar. 31, 2022		47,054,000	8,427,000				4,000,000
Net income	15,081				15,081
Dividend	(198)			(198)
Treasury stock purchases, Value	(2,452)		$ 1,038			(2,452)
Treasury stock purchases, Shares		(1,038)
Ending Balance at Jun. 30, 2022	$ 218,605	$ 555		$ 286,064	$ (54,800)	$ (13,214)	$ 13,200
Ending balance, shares at Jun. 30, 2022		46,016,000				9,465,000	4,000,000