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Note 2 - Summary of Presentation - Assumptions Used in Measuring Fair Value of MSRs (Details) | Dec. 31, 2023 | Dec. 31, 2022
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Measurement Input, Discount Rate [Member] |  |
MSRs, assumption | 0.117 | 0.115
Measurement Input, Prepayment Rate [Member] |  |
MSRs, assumption | 0.031 | 0.031

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- Definition Value of input used to measure servicing asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

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- Details
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Data Type: | na
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- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputPrepaymentRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
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