Summary of Significant Accounting Policies - Basic and diluted earnings per share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Numerator:
Net income	$ 920	$ 1,204
Less: Income allocated to unvested participating securities	14	20
Net income available to common shareholders	$ 906	$ 1,184
Denominator:
Denominator for basic earnings per share - weighted average shares	6,028	5,948
Effect of dilutive securities:
Common stock equivalents	0	0
Denominator for diluted earnings per share - adjusted weighted-average shares and assumed conversions	6,028	5,948
Basic earnings per share:
Basic (Dollars per share)	$ 0.15	$ 0.20
Diluted earnings per share:
Diluted (Dollars per share)	$ 0.15	$ 0.20