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Note 2 - Securities - Amortized Cost and Fair Value of Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Sep. 01, 2022	Dec. 31, 2021
Due within one year, amortized cost, available for sale securities	$ 0
Due within one year, fair value, available for sale securities	0
Due within one year, amortized cost, held to maturity securities	907
Due within one year, fair value, held to maturity securities	902
Due after one year through five years, amortized cost, available for sale securities	17,612
Due after one year through five years, fair value, available for sale securities	16,341
Due after one year through five years, amortized cost, held to maturity securities	44,214
Due after one year through five years, fair value, held to maturity securities	43,113
Due after five years through ten years, amortized cost, available for sale securities	53,590
Due after five years through ten years, fair value, available for sale securities	48,051
Due after five years through ten years, amortized cost, held to maturity securities	27,267
Due after five years through ten years, fair value, held to maturity securities	24,698
Due after ten years, amortized cost, available for sale securities	135,413
Due after ten years, fair value, available for sale securities	112,011
Due after ten years, amortized cost, held to maturity securities	82,506
Due after ten years, fair value, held to maturity securities	74,207
Amortized cost, available for sale securities	206,615		$ 290,058
Fair value, available for sale securities	176,403	$ 74,400	289,495
Amortized cost, held to maturity securities	154,894
Securities, fair value	$ 142,920		$ 33,617

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- Definition

Amount, after allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity) with single maturity date and allocated without single maturity date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 320
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126980459&loc=d3e62586-112803

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (f)(1)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27232-111563

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Fair value of investment in debt security measured at amortized cost (held-to-maturity).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (aa)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27232-111563

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(6))
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5A
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=SL120269820-111563

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant