CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Preferred Stock [Member]	Preferred Stock [Member] Series A Preferred Stock [Member]	Preferred Stock [Member] Series B Preferred Stock [Member]	Common Stock [Member]	Common Stock [Member] Series A Preferred Stock [Member]	Common Stock [Member] Series B Preferred Stock [Member]	Additional Paid-In Capital [Member]	Additional Paid-In Capital [Member] Series A Preferred Stock [Member]	Additional Paid-In Capital [Member] Series B Preferred Stock [Member]	Retained Earnings [Member]	Retained Earnings [Member] Series A Preferred Stock [Member]	Retained Earnings [Member] Series B Preferred Stock [Member]	Accumulated Comprehensive Income (Loss) [Member]	Accumulated Comprehensive Income (Loss) [Member] Series A Preferred Stock [Member]	Accumulated Comprehensive Income (Loss) [Member] Series B Preferred Stock [Member]	Total	Series A Preferred Stock [Member]	Series B Preferred Stock [Member]
Beginning balance at Dec. 31, 2015	$ 4			$ 101			$ 76,335			$ 10,016			$ 0			$ 86,456
Balance (in shares) at Dec. 31, 2015	460,893			10,088,879
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0			$ 0			0			15,540			0			15,540
Stock-based compensation	0			0			184			0			0			184
Stock issued, net of costs	$ 0			$ 20			10,564			0			0			10,584
Stock issued, net of costs (in shares)	0			2,034,300
Stock redemption on Series B preferred stock			$ 0			$ 0			$ (23,393)			$ 0			$ 0			$ (23,393)
Stock redemption on Series B preferred stock (in shares)			(23,393)			0
Dividend declared		$ 0	$ 0		$ 0	$ 0		$ 0	0		$ (210)	(1,231)		$ 0	0		$ (210)	(1,231)
Amortization of discount on Series B preferred stock			0			0			781			(781)			0			0
Ending balance at Dec. 31, 2016	$ 4			$ 121			64,471			23,334			0			87,930
Balance (in shares) at Dec. 31, 2016	437,500			12,123,179
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0			$ 0			0			2,818			0			2,818
Stock-based compensation	0			0			205			0			0			205
Stock issued in purchase transaction	$ 0			$ 1			774			0			0			775
Stock issued in purchase transaction (in shares)	0			108,084
Stock issued, net of costs	$ 0			$ 0			207			0			0			207
Stock issued, net of costs (in shares)	0			2,161
Dividend declared		$ 0			$ 0			$ 0			$ (280)			$ 0			$ (280)
Repurchase of warrant			$ 0			$ 0			$ (520)			$ 0			$ 0			$ (520)
Repurchase of warrant (in shares)			0			0
Other comprehensive loss	$ 0			$ 0			0			0			(35)			(35)
Ending balance at Dec. 31, 2017	$ 4			$ 122			$ 65,137			$ 25,872			$ (35)			$ 91,100
Balance (in shares) at Dec. 31, 2017	437,500			12,233,424