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Note 2 - Securities - Amortized Cost and Fair Value of Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Due within one year, amortized cost, available for sale securities	$ 2,003
Due within one year, fair value, available for sale securities	1,999
Due within one year, amortized cost, held to maturity securities	607
Due within one year, fair value, held to maturity securities	610
Due after one year through five years, amortized cost, available for sale securities	57,501
Due after one year through five years, fair value, available for sale securities	54,848
Due after one year through five years, amortized cost, held to maturity securities	6,511
Due after one year through five years, fair value, held to maturity securities	6,308
Due after five years through ten years, amortized cost, available for sale securities	62,062
Due after five years through ten years, fair value, available for sale securities	57,133
Due after five years through ten years, amortized cost, held to maturity securities	19,173
Due after five years through ten years, fair value, held to maturity securities	17,970
Due after ten years, amortized cost, available for sale securities	174,133
Due after ten years, fair value, available for sale securities	150,770
Due after ten years, amortized cost, held to maturity securities	50,860
Due after ten years, fair value, held to maturity securities	45,604
Amortized cost, available for sale securities	295,699	$ 290,058
Fair value, available for sale securities	264,750	289,495
Amortized cost, held to maturity securities	77,151
Securities, fair value	$ 70,492	$ 33,617

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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