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Note 3 - Securities - Amortized Cost and Fair Value of Securities By Contractual Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Due in one year or less, amortized cost	$ 104,022
Due in one year or less, fair value	102,671
Due after one year through five years, amortized cost	117,022
Due after one year through five years	116,129
Amortized cost, single maturity date, amortized cost	221,044
Fair value, single maturity date	218,800
Amortized cost	225,237	$ 156,750
Fair value	222,906	153,203
Residential Mortgage-Backed Securities [Member]
Amortized cost, without single maturity date, amortized cost	3,255
Fair value, without single maturity date	3,184
Amortized cost	3,255	3,431
Fair value	3,184	3,367
Collateralized Mortgage-Backed Securities [Member]
Amortized cost, without single maturity date, amortized cost	938
Fair value, without single maturity date	922
Amortized cost	938	1,023
Fair value	$ 922	$ 1,003

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