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Note 16 - Fair Value Measurements - Schedule of Estimated Fair Values of Financial Instruments (Details) - USD ($) | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Certificates of deposit at other financial institutions | $ 24,167,000 | $ 4,712,000 |
Securities available-for-sale, at fair value | 292,933,000 | 229,252,000 |
Debt Securities, Held-to-Maturity, Amortized Cost | 8,500,000 | 8,500,000 |
Loans receivable, at fair value | 25,668,000 | 20,093,000 |
Federal Home Loan Bank Stock | 2,114,000 | 10,611,000 |
Loans Receivable, Fair Value Disclosure | 15,088,000 | 14,035,000 |
Accrued interest receivable | 14,005,000 | 11,144,000 |
Financing Receivable, before Allowance for Credit Loss | 2,433,015,000 | 2,218,852,000 | $ 1,754,175,000
Short-Term Debt | 93,746,000 | 186,528,000 |
Subordinated notes, excluding unamortized debt issuance costs | 50,000,000 | 50,000,000 |
Interest Rate Swap [Member] |  |  |
Derivative asset | 6,495,000 | 9,870,000 |
Derivative liabilities, fair value | 375,000 |  |
Mortgage Servicing Rights [Member] |  |  |
Servicing Asset at Fair Value, Amount | 38,200,000 | 35,500,000 |
Fair Value, Inputs, Level 1 [Member] | Reported Value Measurement [Member] |  |  |
Cash and cash equivalents | 65,691,000 | 41,437,000 |
Fair Value, Inputs, Level 1 [Member] | Reported Value Measurement [Member] | Certificates of Deposit [Member] |  |  |
Certificates of deposit at other financial institutions | 24,167,000 | 4,712,000 |
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member] |  |  |
Cash and cash equivalents | 65,691,000 | 41,437,000 |
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member] | Certificates of Deposit [Member] |  |  |
Certificates of deposit at other financial institutions | 24,167,000 | 4,712,000 |
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] |  |  |
Securities available-for-sale, at fair value | 292,933,000 | 229,252,000 |
Debt Securities, Held-to-Maturity, Amortized Cost | 8,500,000 | 8,500,000 |
Loans receivable, at fair value | 25,668,000 | 20,093,000 |
Federal Home Loan Bank Stock | 2,114,000 | 10,611,000 |
Loans Receivable, Fair Value Disclosure | 15,088,000 | 14,035,000 |
Accrued interest receivable | 14,005,000 | 11,144,000 |
Deposits | 2,522,323,000 | 2,127,741,000 |
Short-Term Debt | 93,746,000 | 186,528,000 |
Subordinated notes, excluding unamortized debt issuance costs | 50,000,000 | 50,000,000 |
Accrued interest payable | 5,473,000 | 2,270,000 |
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Interest Rate Swap [Member] |  |  |
Derivative asset | 6,431,000 | 9,870,000 |
Derivative liabilities, fair value | 375,000 | 0 |
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Dealer Offsets to Customer Swap [Member] |  |  |
Derivative asset | 64,000 | 0 |
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Customer Swap [Member] |  |  |
Derivative liabilities, fair value | 63,000 |  |
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Forward TBA Mortgage-Backed Securities [Member] |  |  |
Derivative asset | 0 | 164,000 |
Derivative liabilities, fair value | 284,000 | 0 |
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] |  |  |
Securities available-for-sale, at fair value | 292,933,000 | 229,252,000 |
Debt Securities, Held-to-Maturity, Amortized Cost | 7,666,000 | 7,929,000 |
Loans receivable, at fair value | 25,668,000 | 20,093,000 |
Federal Home Loan Bank Stock | 2,114,000 | 10,611,000 |
Loans Receivable, Fair Value Disclosure | 15,088,000 | 14,035,000 |
Accrued interest receivable | 14,005,000 | 11,144,000 |
Deposits | 2,515,026,000 | 2,105,926,000 |
Short-Term Debt | 93,416,000 | 186,188,000 |
Subordinated notes, excluding unamortized debt issuance costs | 43,480,000 | 44,500,000 |
Accrued interest payable | 5,473,000 | 2,270,000 |
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Interest Rate Swap [Member] |  |  |
Derivative asset | 6,431,000 | 9,870,000 |
Derivative liabilities, fair value | 375,000 | 0 |
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Dealer Offsets to Customer Swap [Member] |  |  |
Derivative asset | 64,000 | 0 |
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Customer Swap [Member] |  |  |
Derivative liabilities, fair value | 63,000 |  |
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Forward TBA Mortgage-Backed Securities [Member] |  |  |
Derivative asset | 0 | 164,000 |
Derivative liabilities, fair value | 284,000 | 0 |
Fair Value, Inputs, Level 3 [Member] | Reported Value Measurement [Member] |  |  |
Financing Receivable, before Allowance for Credit Loss | 2,417,927,000 | 2,204,817,000 |
Fair Value, Inputs, Level 3 [Member] | Reported Value Measurement [Member] | Mortgage Servicing Rights [Member] |  |  |
Servicing Asset at Fair Value, Amount | 9,090,000 | 18,017,000 |
Fair Value, Inputs, Level 3 [Member] | Reported Value Measurement [Member] | Mortgage Servicing Right, Held for Sale [Member] |  |  |
Servicing Asset at Fair Value, Amount | 8,086 | 0 |
Fair Value, Inputs, Level 3 [Member] | Reported Value Measurement [Member] | Interest Rate Lock Commitments [Member] |  |  |
Derivative asset | 0 | 107,000 |
Fair Value, Inputs, Level 3 [Member] | Reported Value Measurement [Member] | Mandatory and Best Effort Forward Commitments [Member] |  |  |
Derivative liabilities, fair value | 188,000 | 38,000 |
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member] |  |  |
Financing Receivable, before Allowance for Credit Loss | 2,276,397,000 | 2,153,769,000 |
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member] | Mortgage Servicing Rights [Member] |  |  |
Servicing Asset at Fair Value, Amount | 20,552,000 | 35,478,000 |
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member] | Mortgage Servicing Right, Held for Sale [Member] |  |  |
Servicing Asset at Fair Value, Amount | 17,611 | 0 |
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member] | Interest Rate Lock Commitments [Member] |  |  |
Derivative asset | 0 | 107,000 |
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member] | Mandatory and Best Effort Forward Commitments [Member] |  |  |
Derivative liabilities, fair value | $ 188,000 | $ 38,000 |

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (aa) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481830/320-10-45-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479130/326-30-45-1 + Details
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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 No definition available. + Details
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- Definition A savings certificate entitling the Entity (that is, bearer) to receive interest at an established maturity date, based upon a fixed interest rate. A certificate of deposit may be issued in any denomination. Certificates of deposit are generally issued by commercial banks and, therefore, insured by the FDIC (up to the prescribed limit). Certificates of deposit generally restrict holders from withdrawing funds on demand without the incurrence of penalties. Generally, only certificates of deposit with original maturities of three months or less qualify as cash equivalents. Original maturity means original maturity to the entity holding the investment. As a related example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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- Definition Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits. + References No definition available. + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. 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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. 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