Annual report pursuant to Section 13 and 15(d)

Note 5 - Fair Value - Assets and Liabilities Measured on Recurring Basis (Details)

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Note 5 - Fair Value - Assets and Liabilities Measured on Recurring Basis (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Sep. 30, 2023
Dec. 31, 2022
Securities available for sale, at fair value $ 508,798 $ 499,257 $ 499,257
Fair Value, Recurring [Member]      
Loans held for sale 0   215
Interest rate swaps 4,856   6,463
Total assets measured at fair value on recurring basis 514,972   507,239
Interest rate swaps (4,856)   (6,463)
Total liabilities measured at fair value on recurring basis (4,856)   (6,463)
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]      
Securities available for sale, at fair value 0    
Loans held for sale 0   0
Interest rate swaps 0   0
Total assets measured at fair value on recurring basis 0   0
Interest rate swaps 0   0
Total liabilities measured at fair value on recurring basis 0   0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]      
Securities available for sale, at fair value 245,492    
Loans held for sale 0   215
Interest rate swaps 4,856   6,463
Total assets measured at fair value on recurring basis 514,972   507,239
Interest rate swaps (4,856)   (6,463)
Total liabilities measured at fair value on recurring basis (4,856)   (6,463)
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]      
Securities available for sale, at fair value 0    
Loans held for sale 0   0
Interest rate swaps 0   0
Total assets measured at fair value on recurring basis 0   0
Interest rate swaps 0   0
Total liabilities measured at fair value on recurring basis 0   0
US Treasury and Government [Member]      
Securities available for sale, at fair value 245,492   224,634
US Treasury and Government [Member] | Fair Value, Recurring [Member]      
Securities available for sale, at fair value 245,492   224,634
US Treasury and Government [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]      
Securities available for sale, at fair value     0
US Treasury and Government [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]      
Securities available for sale, at fair value     224,634
US Treasury and Government [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]      
Securities available for sale, at fair value     0
US Government Agencies Debt Securities [Member]      
Securities available for sale, at fair value 111,336   113,818
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member]      
Securities available for sale, at fair value 111,336   113,818
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]      
Securities available for sale, at fair value 0   0
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]      
Securities available for sale, at fair value 111,336   113,818
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]      
Securities available for sale, at fair value 0   0
Nontaxable Municipal Bonds [Member]      
Securities available for sale, at fair value 30,597   36,710
Nontaxable Municipal Bonds [Member] | Fair Value, Recurring [Member]      
Securities available for sale, at fair value 30,597   36,710
Nontaxable Municipal Bonds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]      
Securities available for sale, at fair value 0   0
Nontaxable Municipal Bonds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]      
Securities available for sale, at fair value 30,597   36,710
Nontaxable Municipal Bonds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]      
Securities available for sale, at fair value 0   0
Taxable Municipal Bonds [Member]      
Securities available for sale, at fair value 110,076   112,171
Taxable Municipal Bonds [Member] | Fair Value, Recurring [Member]      
Securities available for sale, at fair value 110,076   112,171
Taxable Municipal Bonds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]      
Securities available for sale, at fair value 0   0
Taxable Municipal Bonds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]      
Securities available for sale, at fair value 110,076   112,171
Taxable Municipal Bonds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]      
Securities available for sale, at fair value 0   0
Corporate Bonds And Other Debt Securities [Member]      
Securities available for sale, at fair value 11,297   11,924
Corporate Bonds And Other Debt Securities [Member] | Fair Value, Recurring [Member]      
Securities available for sale, at fair value 11,297   11,924
Corporate Bonds And Other Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]      
Securities available for sale, at fair value 0   0
Corporate Bonds And Other Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]      
Securities available for sale, at fair value 11,297   11,924
Corporate Bonds And Other Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]      
Securities available for sale, at fair value 0   0
Other Equity Securities [Member] | Fair Value, Recurring [Member]      
Other equity securities 1,318   1,304
Other Equity Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]      
Other equity securities 0   0
Other Equity Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]      
Other equity securities 1,318   1,304
Other Equity Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]      
Other equity securities $ 0   $ 0