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Note 6 - Fair Value Measurements - Schedule of Financial Assets and Liabilities Fair Values (Details) - USD ($) $ in Thousands | Mar. 31, 2026 | Dec. 31, 2025
--- | --- | ---
Reported Value Measurement [Member] |  |
Cash and cash equivalents | $ 111,291 | $ 86,922
Interest-bearing time deposits | 11,497 | 7,998
Held-to-maturity securities | 51,624 | 55,764
Federal Home Loan Bank stock | 11,142 | 11,852
Loans, net | 1,391,489 | 1,371,819
Accrued interest receivable | 5,329 | 5,214
Federal Home Loan Bank advances | 260,815 | 284,815
Accrued interest payable | 1,578 | 1,905
Loans held-for-sale |  | 357
Reported Value Measurement [Member] | Deposits, Excluding Certificates of Deposit [Member] |  |
Deposits | 403,784 | 404,033
Reported Value Measurement [Member] | Certificates of Deposit [Member] |  |
Deposits | 795,611 | 728,311
Estimate of Fair Value Measurement [Member] |  |
Cash and cash equivalents | 111,291 | 86,922
Interest-bearing time deposits | 11,497 | 7,998
Held-to-maturity securities | 48,044 | 52,326
Federal Home Loan Bank stock | 11,142 | 11,852
Loans, net | 1,357,510 | 1,343,233
Accrued interest receivable | 5,329 | 5,214
Federal Home Loan Bank advances | 261,638 | 286,754
Accrued interest payable | 1,578 | 1,905
Loans held-for-sale |  | 357
Estimate of Fair Value Measurement [Member] | Deposits, Excluding Certificates of Deposit [Member] |  |
Deposits | 403,784 | 404,033
Estimate of Fair Value Measurement [Member] | Certificates of Deposit [Member] |  |
Deposits | 796,149 | 730,175
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Cash and cash equivalents | 111,291 | 86,922
Interest-bearing time deposits | 0 | 0
Held-to-maturity securities | 0 | 0
Federal Home Loan Bank stock | 0 | 0
Loans, net | 0 | 0
Accrued interest receivable | 5,329 | 5,214
Federal Home Loan Bank advances | 0 | 0
Accrued interest payable | 1,578 | 1,905
Loans held-for-sale |  | 0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Deposits, Excluding Certificates of Deposit [Member] |  |
Deposits | 0 | 0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Certificates of Deposit [Member] |  |
Deposits | 0 | 0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Cash and cash equivalents | 0 | 0
Interest-bearing time deposits | 11,497 | 7,998
Held-to-maturity securities | 48,044 | 52,326
Federal Home Loan Bank stock | 11,142 | 11,852
Loans, net | 0 | 0
Accrued interest receivable | 0 | 0
Federal Home Loan Bank advances | 261,638 | 286,754
Accrued interest payable | 0 | 0
Loans held-for-sale |  | 357
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Deposits, Excluding Certificates of Deposit [Member] |  |
Deposits | 403,784 | 404,033
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Certificates of Deposit [Member] |  |
Deposits | 796,149 | 730,175
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Cash and cash equivalents | 0 | 0
Interest-bearing time deposits | 0 | 0
Held-to-maturity securities | 0 | 0
Federal Home Loan Bank stock | 0 | 0
Loans, net | 1,357,510 | 1,343,233
Accrued interest receivable | 0 | 0
Federal Home Loan Bank advances | 0 | 0
Accrued interest payable | 0 | 0
Loans held-for-sale |  | 0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Deposits, Excluding Certificates of Deposit [Member] |  |
Deposits | 0 | 0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Certificates of Deposit [Member] |  |
Deposits | $ 0 | $ 0

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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-10 + Details
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- Definition Fair value portion of borrowing from Federal Home Loan Bank (FHLBank). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-10 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 28 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-28 Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2E -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E + Details
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