Note 5 - Loans and Leases - Troubled Debt Restructurings (Details) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2024	Sep. 30, 2023
Modification percent
Principal Forgiveness [Member]
Modification amount	$ 0	$ 0
Payment Deferral [Member]
Modification amount	335	46
Extended Maturity [Member]
Modification amount	6,614	1,043
Contractual Interest Rate Reduction [Member]
Modification amount	0	3,131
Extended Maturity and Principal Forgiveness [Member]
Modification amount	0	0
Extended Maturity and Interest Rate Reduction [Member]
Modification amount	0	0
Financial Asset, Not Past Due [Member]
Modification amount	8,193
Financial Asset, 30 to 59 Days Past Due [Member]
Modification amount	0
Financial Asset, 60 to 89 Days Past Due [Member]
Modification amount	285
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Modification amount	0
Financial Asset, Past Due [Member]
Modification amount	$ 285
Commercial Real Estate Portfolio Segment [Member]
Principal Forgiveness		$ 0
Weighted-Average Interest Rate Reduction		6.13%
Weighted-Average Term Extension (Month)		82 years 9 months 18 days
Commercial Real Estate Portfolio Segment [Member] \| Non-owner Occupied [Member]
Modification percent	0.07%	1.30%
Principal Forgiveness		$ 0
Weighted-Average Interest Rate Reduction		6.13%
Weighted-Average Term Extension (Month)		8 years 9 months 18 days
Commercial Real Estate Portfolio Segment [Member] \| Non-owner Occupied [Member] \| Principal Forgiveness [Member]
Modification amount	$ 0	$ 0
Commercial Real Estate Portfolio Segment [Member] \| Non-owner Occupied [Member] \| Payment Deferral [Member]
Modification amount	285	0
Commercial Real Estate Portfolio Segment [Member] \| Non-owner Occupied [Member] \| Extended Maturity [Member]
Modification amount	0	915
Commercial Real Estate Portfolio Segment [Member] \| Non-owner Occupied [Member] \| Contractual Interest Rate Reduction [Member]
Modification amount	0	3,131
Commercial Real Estate Portfolio Segment [Member] \| Non-owner Occupied [Member] \| Extended Maturity and Principal Forgiveness [Member]
Modification amount	0	0
Commercial Real Estate Portfolio Segment [Member] \| Non-owner Occupied [Member] \| Extended Maturity and Interest Rate Reduction [Member]
Modification amount	0	$ 0
Commercial Real Estate Portfolio Segment [Member] \| Non-owner Occupied [Member] \| Financial Asset, Not Past Due [Member]
Modification amount	0
Commercial Real Estate Portfolio Segment [Member] \| Non-owner Occupied [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Modification amount	0
Commercial Real Estate Portfolio Segment [Member] \| Non-owner Occupied [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Modification amount	285
Commercial Real Estate Portfolio Segment [Member] \| Non-owner Occupied [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Modification amount	0
Commercial Real Estate Portfolio Segment [Member] \| Non-owner Occupied [Member] \| Financial Asset, Past Due [Member]
Modification amount	$ 285
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied [Member]
Modification percent	2.23%	0.04%
Principal Forgiveness	$ 0	$ 0
Weighted-Average Interest Rate Reduction	0.00%	0.00%
Weighted-Average Term Extension (Month)	12 months	74 years
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied [Member] \| Principal Forgiveness [Member]
Modification amount	$ 0	$ 0
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied [Member] \| Payment Deferral [Member]
Modification amount	0	0
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied [Member] \| Extended Maturity [Member]
Modification amount	6,614	128
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied [Member] \| Contractual Interest Rate Reduction [Member]
Modification amount	0	0
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied [Member] \| Extended Maturity and Principal Forgiveness [Member]
Modification amount	0	0
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied [Member] \| Extended Maturity and Interest Rate Reduction [Member]
Modification amount	0	$ 0
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied [Member] \| Financial Asset, Not Past Due [Member]
Modification amount	8,143
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Modification amount	0
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Modification amount	0
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Modification amount	0
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied [Member] \| Financial Asset, Past Due [Member]
Modification amount	$ 0
Commercial Portfolio Segment [Member] \| Commercial [Member]
Modification percent	0.03%	0.03%
Commercial Portfolio Segment [Member] \| Commercial [Member] \| Principal Forgiveness [Member]
Modification amount	$ 0	$ 0
Commercial Portfolio Segment [Member] \| Commercial [Member] \| Payment Deferral [Member]
Modification amount	50	46
Commercial Portfolio Segment [Member] \| Commercial [Member] \| Extended Maturity [Member]
Modification amount	0	0
Commercial Portfolio Segment [Member] \| Commercial [Member] \| Contractual Interest Rate Reduction [Member]
Modification amount	0	0
Commercial Portfolio Segment [Member] \| Commercial [Member] \| Extended Maturity and Principal Forgiveness [Member]
Modification amount	0	0
Commercial Portfolio Segment [Member] \| Commercial [Member] \| Extended Maturity and Interest Rate Reduction [Member]
Modification amount	0	$ 0
Commercial Portfolio Segment [Member] \| Commercial [Member] \| Financial Asset, Not Past Due [Member]
Modification amount	50
Commercial Portfolio Segment [Member] \| Commercial [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Modification amount	0
Commercial Portfolio Segment [Member] \| Commercial [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Modification amount	0
Commercial Portfolio Segment [Member] \| Commercial [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Modification amount	0
Commercial Portfolio Segment [Member] \| Commercial [Member] \| Financial Asset, Past Due [Member]
Modification amount	$ 0

Percentage of financing receivable modified during period for debtor experiencing financial difficulty to total financing receivables.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 12A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481933/310-10-55-12A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-42

+ Details

Name:	us-gaap_FinancingReceivableModificationToTotalFinancingReceivablesPercent
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amortized cost of financing receivable modified during period for debtor experiencing financial difficulty.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 33
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-33

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 12A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481933/310-10-55-12A

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-42

+ Details

Name:	us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Percentage of decrease in weighted average contractual interest rate of financing receivable modified for debtor experiencing financial difficulty.

+ References

+ Details

Name:	us-gaap_FinancingReceivableModifiedWeightedAverageInterestRateDecreaseFromModification
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of increase in weighted average maturity of financing receivable modified for debtor experiencing financial difficulty, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

+ Details

Name:	us-gaap_FinancingReceivableModifiedWeightedAverageTermIncreaseFromModification
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of increase (decrease) in amortized cost of financing receivable modified for debtor experiencing financial difficulty.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 33
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-33

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 12A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481933/310-10-55-12A

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-42

+ Details

Name:	us-gaap_FinancingReceivableTroubledDebtRestructuringIncreaseDecreaseFromModification
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration