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Note 4 - Mortgage Servicing Rights - Fair Value of Servicing Rights (Details) - Mortgage Servicing Rights [Member]	Mar. 31, 2026	Dec. 31, 2025
Measurement Input, Discount Rate [Member]
Valuation assumptions	0.12	0.12
Measurement Input, Prepayment Rate [Member] | Minimum [Member]
Valuation assumptions	0.94	0.90
Measurement Input, Prepayment Rate [Member] | Maximum [Member]
Valuation assumptions	2.79	2.11
Measurement Input, Weighted Average Prepayment Rate [Member]
Valuation assumptions	1.27	1.19

X

- 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)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 3: 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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- Details

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- Details

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- Details

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