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Note 2 - Debt Securities - Securities Available-for-sale (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Jan. 01, 2021
[1]
Dec. 31, 2020
Securities available for sale, amortized cost $ 87,061   $ 81,958
Securities available for sale, unrealized gains 1,327   1,501
Securities available for sale, unrealized losses (745)   (101)
Securities available for sale, fair value 87,643 $ 83,358 83,358 [2]
US Government Agencies Debt Securities [Member]      
Securities available for sale, amortized cost 534   555
Securities available for sale, unrealized gains 0   0
Securities available for sale, unrealized losses (4)   (4)
Securities available for sale, fair value 530   551
US States and Political Subdivisions Debt Securities [Member]      
Securities available for sale, amortized cost 40,125   43,950
Securities available for sale, unrealized gains 370   509
Securities available for sale, unrealized losses 0   0
Securities available for sale, fair value 40,495   44,459
Mortgage-backed Agency Securities [Member]      
Securities available for sale, amortized cost 46,402   37,453
Securities available for sale, unrealized gains 957   992
Securities available for sale, unrealized losses (741)   (97)
Securities available for sale, fair value $ 46,618   $ 38,348
[1] Per our analysis no ACL was necessary for investment securities available-for-sale.
[2] Derived from audited financial statements