Securities - Summary of Amortized Cost and Fair Value of Securities Available for Sale, with Unrealized Gains and Losses (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Securities Available for Sale [Abstract]
Amortized cost	$ 79,502	$ 78,144
Gross unrealized gains	3,382	1,739
Gross unrealized (losses)	(36)	(100)
Fair value	82,848	79,783
Obligations of U.S. Government Corporations and Agencies [Member]
Securities Available for Sale [Abstract]
Amortized cost	57,486	63,090
Gross unrealized gains	1,759	937
Gross unrealized (losses)	(35)	(86)
Fair value	59,210	63,941
Obligations of States and Political Subdivisions [Member]
Securities Available for Sale [Abstract]
Amortized cost	22,016	15,054
Gross unrealized gains	1,623	802
Gross unrealized (losses)	(1)	(14)
Fair value	$ 23,638	$ 15,842

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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