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Debt Securities - Schedule of Amortized Cost and Approximate Fair Values of Debt Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Held-to-maturity, amortized cost	$ 2,465	$ 3,399
Held-to-maturity, gross unrealized gains	105	150
Held-to-maturity, gross unrealized losses
Held-to-maturity, fair value	2,570	3,549
Available for sale, amortized cost	23,252	18,843
Available for sale, gross unrealized gains	61	109
Available for sale, gross unrealized losses	(933)	(59)
Available for sale, fair value	22,380	18,893
Taxable Municipal Securities [Member]
Available for sale, amortized cost	10,249	5,063
Available for sale, gross unrealized gains		29
Available for sale, gross unrealized losses	(591)	(7)
Available for sale, fair value	9,658	5,085
SBA Pool Securities [Member]
Available for sale, amortized cost	1,272	1,338
Available for sale, gross unrealized gains
Available for sale, gross unrealized losses	(39)	(41)
Available for sale, fair value	1,233	1,297
Collateralized Mortgage Obligations [Member]
Held-to-maturity, amortized cost	1,864	2,420
Held-to-maturity, gross unrealized gains	86	116
Held-to-maturity, gross unrealized losses
Held-to-maturity, fair value	1,950	2,536
Available for sale, amortized cost	369	458
Available for sale, gross unrealized gains	23	27
Available for sale, gross unrealized losses
Available for sale, fair value	392	485
Mortgage-backed Securities [Member]
Held-to-maturity, amortized cost	601	979
Held-to-maturity, gross unrealized gains	19	34
Held-to-maturity, gross unrealized losses
Held-to-maturity, fair value	620	1,013
Available for sale, amortized cost	11,362	11,984
Available for sale, gross unrealized gains	38	53
Available for sale, gross unrealized losses	(303)	(11)
Available for sale, fair value	$ 11,097	$ 12,026

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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Amount of accumulated unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity).

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Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity).

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Amount, after allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity) with single maturity date and allocated without single maturity date.

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