Summary of Significant Accounting Policies (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Numerator:
Net income	$ 1,370	$ 1,529
Less: Income allocated to unvested participating securities	26	26
Net income available to common stockholders	$ 1,344	$ 1,503
Denominator:
Denominator for basic earnings per share— weighted average shares	5,841	5,842
Effect of dilutive securities:
Common stock equivalents	0	0
Denominator for diluted earnings per share — adjusted weighted-average shares and assumed conversions	5,841	5,842
Earnings per share:
Basic	$ 0.23	$ 0.26
Diluted	$ 0.23	$ 0.26