v3.26.1
Note 17 - Fair Values of Financial Instruments - Reconciliation for Assets Measured at Fair Value on Recurring Basis Using significant Unobservable Inputs (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Balance $ 4,811 $ 5,713  
Realized gain (loss) included in net income 0 0 $ 0
Unrealized (loss) gain included in other comprehensive loss 210 (875)  
Purchases 0 0  
Sales 0 0  
Maturities, prepayments, and calls (1,417) (27)  
Transfers into level 3 0 0  
Transfers out of level 3 0 0  
Balance 3,604 4,811 5,713
US States and Political Subdivisions Debt Securities [Member]      
Balance 4,317 5,250  
Realized gain (loss) included in net income 0 0  
Unrealized (loss) gain included in other comprehensive loss 204 (906)  
Purchases 0 0  
Sales 0 0  
Maturities, prepayments, and calls (917) (27)  
Transfers into level 3 0 0  
Transfers out of level 3 0 0  
Balance 3,604 4,317 5,250
Corporate Debt Securities [Member]      
Balance 494 463  
Realized gain (loss) included in net income 0 0  
Unrealized (loss) gain included in other comprehensive loss 6 31  
Purchases 0 0  
Sales 0 0  
Maturities, prepayments, and calls (500) 0  
Transfers into level 3 0 0  
Transfers out of level 3 0 0  
Balance $ 0 $ 494 $ 463