Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Treasury Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment
Beginning Balance at Dec. 31, 2018	$ 52,333	$ 80	$ 12,094	$ (14,235)	$ 8,982	$ (2,058)	$ (42)	$ 47,550	$ 122
Ending Balance, shares at Dec. 31, 2018			3,350,833
Net income	3,478							3,478
Other comprehensive loss	$ 1					1
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201802Member
Stock compensation expense	$ 498				498
Distributions to shareholders	(809)							(809)
Cash settlement of stock options	(779)				(779)
Ending Balance at Jun. 30, 2019	54,802		$ 12,094	(14,235)	8,701	(2,099)		50,341
Ending Balance, shares at Jun. 30, 2019			3,350,833
Beginning Balance at Mar. 31, 2019	52,868		$ 12,094	(14,235)	9,114	(2,179)		48,074
Ending Balance, shares at Mar. 31, 2019			3,350,833
Net income	2,671							2,671
Other comprehensive loss	80					80
Stock compensation expense	286				286
Distributions to shareholders	(404)							(404)
Cash settlement of stock options	(699)				(699)
Ending Balance at Jun. 30, 2019	54,802		$ 12,094	(14,235)	8,701	(2,099)		50,341
Ending Balance, shares at Jun. 30, 2019			3,350,833
Beginning Balance at Dec. 31, 2019	55,704		$ 12,094	(14,235)	8,262	(1,988)		51,571
Ending Balance, shares at Dec. 31, 2019			3,350,833
Net income	4,476							4,476
Other comprehensive loss	(128)					(128)
Stock compensation expense	602				602
Distributions to shareholders	(800)							(800)
Cash settlement of stock options	(560)				(560)
Purchase of treasury stock	(287)			(287)
Purchase of treasury stock (shares)			(14,420)
Ending Balance at Jun. 30, 2020	59,007		$ 12,094	(14,522)	8,304	(2,116)		55,247
Ending Balance, shares at Jun. 30, 2020			3,336,413
Beginning Balance at Mar. 31, 2020	55,824		$ 12,094	(14,449)	8,048	(2,317)		52,448
Ending Balance, shares at Mar. 31, 2020			3,340,114
Net income	3,199							3,199
Other comprehensive loss	201					201
Stock compensation expense	359				359
Distributions to shareholders	(400)							(400)
Cash settlement of stock options	(103)				(103)
Purchase of treasury stock	(73)			(73)
Purchase of treasury stock (shares)			(3,701)
Ending Balance at Jun. 30, 2020	$ 59,007		$ 12,094	$ (14,522)	$ 8,304	$ (2,116)		$ 55,247
Ending Balance, shares at Jun. 30, 2020			3,336,413