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Note 17 - Available-for-sale Securities Measured at Fair Value Using Significant Unobservable Inputs (Details) - Fair Value, Inputs, Level 3 [Member] - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Balance, beginning of year $ 53 $ 75
Payments received (1) (22)
Sale of securities 0 0
Included in earnings 0 0
Included in other comprehensive income 0 0
Transfers in and/or out of Level 3 0 0
Balance, end of year $ 52 $ 53