v3.26.1
Note 3 - Fair Value Measurements - Carrying Amounts and Estimated Fair Values of Financial Instruments (Details) - USD ($)
Dec. 31, 2025
Dec. 31, 2024
Time deposits $ 210,728,000  
Reported Value Measurement [Member]    
Loans, net 1,495,834,000 $ 1,005,375,000
Time deposits 210,729,000 94,189,000
Repurchase agreements 97,855,000 22,073,000
Borrowings 21,013,000 15,000,000
Estimate of Fair Value Measurement [Member]    
Loans, net 1,494,830,000 981,114,000
Time deposits 209,147,000 94,161,000
Repurchase agreements 97,855,000 22,073,000
Borrowings 20,599,000 13,967,000
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]    
Loans, net 0 0
Time deposits 0 0
Repurchase agreements 0 0
Borrowings 0 0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]    
Loans, net 0 0
Time deposits 209,147,000 94,161,000
Repurchase agreements 97,855,000 22,073,000
Borrowings 20,599,000 13,967,000
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]    
Loans, net 1,494,830,000 981,114,000
Time deposits 0 0
Repurchase agreements 0 0
Borrowings $ 0 $ 0