Fair Value Measurements - Recurring Basis (Details) - Measured on a recurring basis - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Securities available for sale:
Total securities available for sale	$ 128,011	$ 104,321
Obligations of U.S. Government agencies
Securities available for sale:
Total securities available for sale	5,918	10,312
Obligations of States and political subdivisions
Securities available for sale:
Total securities available for sale	38,487	34,558
Mortgage-backed securities
Securities available for sale:
Total securities available for sale	80,046	56,421
Subordinated debt investments
Securities available for sale:
Total securities available for sale	3,560	3,030
Level 2
Securities available for sale:
Total securities available for sale	128,011	104,321
Level 2 | Obligations of U.S. Government agencies
Securities available for sale:
Total securities available for sale	5,918	10,312
Level 2 | Obligations of States and political subdivisions
Securities available for sale:
Total securities available for sale	38,487	34,558
Level 2 | Mortgage-backed securities
Securities available for sale:
Total securities available for sale	80,046	56,421
Level 2 | Subordinated debt investments
Securities available for sale:
Total securities available for sale	$ 3,560	$ 3,030