Consolidated Statement Of Changes In Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member] Series C Preferred Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings (Accumulated Deficit) [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Non-Voting Common Stock [Member]	Series C Preferred Stock [Member]	Total
Balance at Dec. 31, 2018	$ 44		$ 61,706	$ (12,752)	$ (73)	$ (3,366)			$ 45,559
Net income				3,961					3,961
Other comprehensive income (loss)					87				87
Issuance of stock based incentive plan shares, net of forfeitures
Restricted stock expense, net of forfeitures			254						254
Exercise of warrants to common stock	1		1,058						1,059
Accretion of discount and value of warrants exercised			(183)	183
Balance at Jun. 30, 2019	45		62,835	(8,608)	14	(3,366)			50,920
Balance at Mar. 31, 2019	44		62,039	(11,045)	(38)	(3,366)			47,634
Net income				2,280					2,280
Other comprehensive income (loss)					52				52
Restricted stock expense, net of forfeitures			138						138
Exercise of warrants to common stock	1		815						816
Accretion of discount and value of warrants exercised			(157)	157
Balance at Jun. 30, 2019	45		62,835	(8,608)	14	(3,366)			50,920
Balance at Dec. 31, 2019	54		86,903	(2,932)	28	(3,389)			80,664
Net income				12,074					12,074
Other comprehensive income (loss)					118				118
Restricted stock expense, net of forfeitures			350						350
Stock options exercised			36						36
Acquisition of treasury shares surrendered upon vesting of restricted stock for payment of taxes						(27)			(27)
Purchase of treasury shares						(648)			(648)
Conversion of 12,607 shares of Series C preferred stock to 1,260,700 shares of non-voting common stock		$ (13)						$ 13
Balance at Jun. 30, 2020	54		87,276	9,142	146	(4,064)	13		92,567
Balance at Mar. 31, 2020	54		87,046	(926)	172	(3,465)			82,881
Net income				10,068					10,068
Other comprehensive income (loss)					(26)				(26)
Restricted stock expense, net of forfeitures			207						207
Stock options exercised			36						36
Purchase of treasury shares						(599)			(599)
Conversion of 12,607 shares of Series C preferred stock to 1,260,700 shares of non-voting common stock		$ (13)						$ 13
Balance at Jun. 30, 2020	$ 54		$ 87,276	$ 9,142	$ 146	$ (4,064)	$ 13		$ 92,567