Summary of Significant Accounting Policies (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Numerator:
Income from continuing operations	$ 1,529	$ 1,047
Less: Income allocated to unvested participating securities	26	19
Income from continuing operations available to common stockholders	1,503	1,028
Income from discontinued operations	0	891
Less: Income allocated to unvested participating securities	0	16
Income from discontinued operations available to common stockholders	0	875
Net income available to common stockholders	$ 1,503	$ 1,903
Denominator:
Denominator for basic earnings per share— weighted average shares	5,842	5,790
Effect of dilutive securities:
Common stock equivalents	0	12
Denominator for diluted earnings per share — adjusted weighted-average shares and assumed conversions	5,842	5,802
Basic earnings per share:
From continuing operations	$ 0.26	$ 0.18
From discontinued operations	0	0.15
Basic earnings per share	0.26	0.33
Diluted earnings per share
From continuing operations	0.26	0.18
From discontinued operations	0	0.15
Diluted earnings per share	$ 0.26	$ 0.33