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Note 7 - Fair Value - Financial Assets At Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Securities	$ 357,165	$ 360,530
US States and Political Subdivisions Debt Securities [Member]
Securities	706	706
US Treasury and Government [Member]
Securities	342,855	246,290
US Government-sponsored Enterprises Debt Securities [Member]
Securities	9,981	109,773
Residential Mortgage-Backed Securities [Member]
Securities	2,800	2,911
Collateralized Mortgage-Backed Securities [Member]
Securities	823	850
Fair Value, Inputs, Level 1 [Member]
Securities	342,855	246,290
Fair Value, Inputs, Level 1 [Member] | US States and Political Subdivisions Debt Securities [Member]
Securities	0	0
Fair Value, Inputs, Level 1 [Member] | US Treasury and Government [Member]
Securities	342,855	246,290
Fair Value, Inputs, Level 1 [Member] | US Government-sponsored Enterprises Debt Securities [Member]
Securities	0	0
Fair Value, Inputs, Level 1 [Member] | Residential Mortgage-Backed Securities [Member]
Securities	0	0
Fair Value, Inputs, Level 1 [Member] | Collateralized Mortgage-Backed Securities [Member]
Securities	0	0
Fair Value, Inputs, Level 2 [Member]
Securities	14,310	114,240
Fair Value, Inputs, Level 2 [Member] | US States and Political Subdivisions Debt Securities [Member]
Securities	706	706
Fair Value, Inputs, Level 2 [Member] | US Treasury and Government [Member]
Securities	0	0
Fair Value, Inputs, Level 2 [Member] | US Government-sponsored Enterprises Debt Securities [Member]
Securities	9,981	109,773
Fair Value, Inputs, Level 2 [Member] | Residential Mortgage-Backed Securities [Member]
Securities	2,800	2,911
Fair Value, Inputs, Level 2 [Member] | Collateralized Mortgage-Backed Securities [Member]
Securities	823	850
Fair Value, Inputs, Level 3 [Member]
Securities	0	0
Fair Value, Inputs, Level 3 [Member] | US States and Political Subdivisions Debt Securities [Member]
Securities	0	0
Fair Value, Inputs, Level 3 [Member] | US Treasury and Government [Member]
Securities	0	0
Fair Value, Inputs, Level 3 [Member] | US Government-sponsored Enterprises Debt Securities [Member]
Securities	0	0
Fair Value, Inputs, Level 3 [Member] | Residential Mortgage-Backed Securities [Member]
Securities	0	0
Fair Value, Inputs, Level 3 [Member] | Collateralized Mortgage-Backed Securities [Member]
Securities	$ 0	$ 0

X

- 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/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 13: http://www.xbrl.org/2003/role/disclosureRef
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Reference 14: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 15: http://www.xbrl.org/2003/role/disclosureRef
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Reference 16: http://www.xbrl.org/2003/role/disclosureRef
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