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Note 7 - Fair Value - Financial Assets At Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Securities	$ 199,339	$ 85,694
Certificates of Deposit [Member]
Securities	1,488	2,728
US States and Political Subdivisions Debt Securities [Member]
Securities	383
US Treasury and Government [Member]
Securities	162,265
US Government-sponsored Enterprises Debt Securities [Member]
Securities	29,750
Residential Mortgage-Backed Securities [Member]
Securities	4,181	4,833
Collateralized Mortgage-Backed Securities [Member]
Securities	1,272	1,580
US Treasury Securities [Member]
Securities	162,265	76,553
Fair Value, Inputs, Level 1 [Member]
Securities	162,265	76,553
Fair Value, Inputs, Level 1 [Member] | Certificates of Deposit [Member]
Securities	0	0
Fair Value, Inputs, Level 1 [Member] | US States and Political Subdivisions Debt Securities [Member]
Securities	0
Fair Value, Inputs, Level 1 [Member] | US Treasury and Government [Member]
Securities	162,265
Fair Value, Inputs, Level 1 [Member] | US Government-sponsored Enterprises Debt Securities [Member]
Securities	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 1 [Member] | US Treasury Securities [Member]
Securities		76,553
Fair Value, Inputs, Level 2 [Member]
Securities	37,074	9,141
Fair Value, Inputs, Level 2 [Member] | Certificates of Deposit [Member]
Securities	1,488	2,728
Fair Value, Inputs, Level 2 [Member] | US States and Political Subdivisions Debt Securities [Member]
Securities	383
Fair Value, Inputs, Level 2 [Member] | US Treasury and Government [Member]
Securities	0
Fair Value, Inputs, Level 2 [Member] | US Government-sponsored Enterprises Debt Securities [Member]
Securities	29,750
Fair Value, Inputs, Level 2 [Member] | Residential Mortgage-Backed Securities [Member]
Securities	4,181	4,833
Fair Value, Inputs, Level 2 [Member] | Collateralized Mortgage-Backed Securities [Member]
Securities	1,272	1,580
Fair Value, Inputs, Level 2 [Member] | US Treasury Securities [Member]
Securities		0
Fair Value, Inputs, Level 3 [Member]
Securities	0	0
Fair Value, Inputs, Level 3 [Member] | Certificates of Deposit [Member]
Securities	0	0
Fair Value, Inputs, Level 3 [Member] | US States and Political Subdivisions Debt Securities [Member]
Securities	0
Fair Value, Inputs, Level 3 [Member] | US Treasury and Government [Member]
Securities	0
Fair Value, Inputs, Level 3 [Member] | US Government-sponsored Enterprises Debt Securities [Member]
Securities	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
Fair Value, Inputs, Level 3 [Member] | US Treasury Securities [Member]
Securities		$ 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/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 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (aa)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563

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