Quarterly report [Sections 13 or 15(d)]

Note 5 - Other Borrowings - Outstanding Advances (Details)

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Note 5 - Other Borrowings - Outstanding Advances (Details) - Federal Home Loan Bank of Chicago [Member] - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Average balance outstanding $ 0 $ 5,000
Average interest rate during the period   4.80%
Maximum [Member]    
Average balance outstanding $ 0 $ 5,000