Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	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	$ 12,094	$ (14,235)	$ 8,982	$ (2,058)	$ (122)	$ 47,550	$ 122
Ending Balance, shares at Dec. 31, 2018		3,350,833
Net income	4,537						4,537
Other comprehensive (loss) gain	(124)				(124)
Accounting Standards Update [Extensible List]						us-gaap:AccountingStandardsUpdate201802Member		us-gaap:AccountingStandardsUpdate201802Member
Stock compensation expense	745			745
Distributions to shareholders	(1,213)						(1,213)
Cash settlement of stock options	(1,254)			(1,254)
Ending Balance at Sep. 30, 2019	55,024	$ 12,094	(14,235)	8,473	(2,304)		50,996
Ending Balance, shares at Sep. 30, 2019		3,350,833
Beginning 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
Net income	1,059						1,059
Other comprehensive (loss) gain	(205)				(205)
Stock compensation expense	247			247
Distributions to shareholders	(404)						(404)
Cash settlement of stock options	(475)			(475)
Ending Balance at Sep. 30, 2019	55,024	$ 12,094	(14,235)	8,473	(2,304)		50,996
Ending Balance, shares at Sep. 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	6,055						6,055
Other comprehensive (loss) gain	142				142
Stock compensation expense	929			929
Distributions to shareholders	(1,201)						(1,201)
Issuance of common stock	59	$ 7		52
Issuance of common stock (shares)		2,500
Cash settlement of stock options	(805)			(805)
Purchase of treasury stock	(287)		(287)
Purchase of treasury stock (shares)		(14,420)
Ending Balance at Sep. 30, 2020	60,596	$ 12,101	(14,522)	8,438	(1,846)		56,425
Ending Balance, shares at Sep. 30, 2020		3,338,913
Beginning 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
Net income	1,579						1,579
Other comprehensive (loss) gain	270				270
Stock compensation expense	327			327
Distributions to shareholders	(401)						(401)
Issuance of common stock	59	$ 7		52
Issuance of common stock (shares)		2,500
Cash settlement of stock options	(245)			(245)
Ending Balance at Sep. 30, 2020	$ 60,596	$ 12,101	$ (14,522)	$ 8,438	$ (1,846)		$ 56,425
Ending Balance, shares at Sep. 30, 2020		3,338,913