Summary of Significant Accounting Policies (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Numerator:
Income from continuing operations	$ 3,375	$ 3,645	$ 4,422	$ 5,658
Less: Income allocated to unvested participating securities	59	67	78	105
Income from continuing operations available to common stockholders	3,316	3,578	4,344	5,553
Income from discontinued operations	1,159	1,166	2,050	2,177
Less: Income allocated to unvested participating securities	21	22	36	40
Income from discontinued operations available to common stockholders	1,138	1,144	2,014	2,137
Net income available to common stockholders	$ 4,454	$ 4,722	$ 6,358	$ 7,690
Denominator:
Denominator for basic earnings per share— weighted average shares	5,803	5,754	5,796	5,752
Effect of dilutive securities:
Common stock equivalents	3	9	8	9
Denominator for diluted earnings per share — adjusted weighted-average shares and assumed conversions	5,806	5,763	5,804	5,761
Basic earnings per share:
From continuing operations	$ 0.57	$ 0.62	$ 0.75	$ 0.97
From discontinued operations	0.20	0.20	0.35	0.37
Basic earnings per share	0.77	0.82	1.10	1.34
Diluted Earnings per share:
From continuing operations	0.57	0.61	0.75	0.96
From discontinued operations	0.20	0.20	0.35	0.37
Diluted earnings per share	$ 0.77	$ 0.81	$ 1.10	$ 1.33