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v3.26.1

Note 7 - Commitments and Contingencies (Details Textual) | 2 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Mar. 13, 2026 USD ($) | Mar. 31, 2026 USD ($) | Mar. 31, 2025 USD ($) | Dec. 31, 2025 USD ($) | Mar. 12, 2026 USD ($)
Unused Commitments to Extend Credit |  | $ 143,200,000 |  | $ 158,300,000 |
Off-Balance-Sheet, Credit Loss, Liability |  | 762,300 |  | 829,100 |
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) | $ 66,800 | 66,800 | $ 73,300 |  |
Fair Value Disclosure, off-Balance-Sheet Risks, Amount, Liability |  | 198,000 |  | 189,800 |
Deposits |  | 1,698,744,000 |  | 1,758,669,000 |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss |  | 2,043,296,000 |  | 2,035,227,000 |
Cannabis-related Loan [Member] |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss |  | $ 46,000,000 |  | $ 47,000,000 |
Customer Concentration Risk [Member] | Deposits [Member] |  |  |  |  |
Number of Major Customers |  | 2 |  | 2 |
Cannabis Customers [Member] |  |  |  |  |
Deposits |  | $ 56,200,000 |  | $ 61,900,000 |
Cannabis Customers [Member] | Customer Concentration Risk [Member] | Deposits [Member] |  |  |  |  |
Concentration Risk, Percentage |  | 3.30% |  | 3.50% |
Two Customers [Member] | Customer Concentration Risk [Member] | Deposits [Member] |  |  |  |  |
Concentration Risk, Percentage |  | 27.80% |  | 30.70% |
Standby Letters of Credit [Member] |  |  |  |  |
Fair Value Disclosure, off-Balance-Sheet Risks, Amount, Liability |  | $ 600,000 |  | $ 600,000 |
Municipal Letter of Credit [Member] |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  | $ 100,000,000
Short-Term Debt |  | $ 0 |  |  |

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