Consolidated Statements 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				6,578					6,578
Other comprehensive income (loss)					97				97
Issuance of stock based incentive plan shares, net of forfeitures
Restricted stock expense, net of forfeitures			390						390
Exercise of warrants to common stock	1		1,257						1,258
Accretion of discount and value of warrants exercised			(219)	219
Balance at Sep. 30, 2019	45		63,134	(5,955)	24	(3,366)			53,882
Balance at Jun. 30, 2019	45		62,835	(8,608)	14	(3,366)			50,920
Net income				2,617					2,617
Other comprehensive income (loss)					10				10
Restricted stock expense, net of forfeitures			136						136
Exercise of warrants to common stock			199						199
Accretion of discount and value of warrants exercised			(36)	36
Balance at Sep. 30, 2019	45		63,134	(5,955)	24	(3,366)			53,882
Balance at Dec. 31, 2019	54		86,903	(2,932)	28	(3,389)			80,664
Net income				22,260					22,260
Other comprehensive income (loss)					94				94
Issuance of stock based incentive plan shares, net of forfeitures
Restricted stock expense, net of forfeitures			590						590
Stock options exercised			36						36
Acquisition of 1,869 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 Sep. 30, 2020	54		87,516	19,328	122	(4,064)	13		102,969
Balance at Jun. 30, 2020	54		87,276	9,142	146	(4,064)	13		92,567
Net income				10,186					10,186
Other comprehensive income (loss)					(24)				(24)
Issuance of stock based incentive plan shares, net of forfeitures
Restricted stock expense, net of forfeitures			240						240
Balance at Sep. 30, 2020	$ 54		$ 87,516	$ 19,328	$ 122	$ (4,064)	$ 13		$ 102,969