INVESTMENT SECURITIES - Amortized cost, gross unrealized gains and losses (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Debt Securities Available-for-sale
Gross Amortized Cost	$ 16,299	$ 17,856
Gross Unrealized Gains	230	261
Gross Unrealized Losses	(22)
Total securities available for sale	16,507	18,117
Obligations of U.S. Government entities and agencies.
Debt Securities Available-for-sale
Gross Amortized Cost	7,146	9,306
Total securities available for sale	7,146	9,306
States and political subdivisions
Debt Securities Available-for-sale
Gross Amortized Cost	8,181	7,182
Gross Unrealized Gains	214	247
Gross Unrealized Losses	(22)
Total securities available for sale	8,373	7,429
Mortgage-backed GSE residential
Debt Securities Available-for-sale
Gross Amortized Cost	972	1,368
Gross Unrealized Gains	16	14
Total securities available for sale	$ 988	$ 1,382

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).

+ References

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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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