Summary of Significant Accounting Policies - Basic and Diluted Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Basic and Diluted
Net income	$ 1,908	$ 1,579
Less allocated earnings on non-vested restricted stock	(78)	(32)
Less allocated dividends on non-vested restricted stock	(25)	(35)
Net income allocated to common stockholders	$ 1,805	$ 1,512
Weighted Average Number of Shares Outstanding, Basic and Diluted	5,472,033	5,463,739
Basic and diluted earnings per share	$ 0.33	$ 0.28