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Note 5 - Fair Value Measurements - Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Securities available-for-sale | $ 783,967 | $ 831,003
Reported Value Measurement [Member] |  |
Securities available-for-sale | 783,967 | 831,003
Estimate of Fair Value Measurement [Member] |  |
Securities available-for-sale | 783,967 | 831,003
Fair Value, Inputs, Level 1 [Member] | Reported Value Measurement [Member] |  |
Cash and cash equivalents | 29,255 | 89,129
Accrued income receivable | 12,073 | 10,124
Securities sold under agreements to repurchase | 41,069 | 39,851
Accrued interest payable | 319 | 353
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member] |  |
Cash and cash equivalents | 29,255 | 89,129
Accrued income receivable | 12,073 | 10,124
Securities sold under agreements to repurchase | 41,069 | 39,851
Accrued interest payable | 319 | 353
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] |  |
Interest-bearing time deposits | 15,410 | 16,922
FHLB and FRB stock | 4,141 | 3,422
Loans receivable | 1,175,247 | 1,144,108
Loans held for sale | 467 | 0
Derivative financial instruments | 1,165 | 0
Deposits | 1,873,011 | 1,878,019
FHLB advances and other borrowings | 27,450 | 3,000
Derivative financial instruments | 0 | 527
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] |  |
Interest-bearing time deposits | 15,410 | 16,922
FHLB and FRB stock | 4,141 | 3,422
Loans receivable | 1,120,219 | 1,112,684
Loans held for sale | 467 | 0
Derivative financial instruments | 1,165 | 0
Deposits | 1,871,699 | 1,880,137
FHLB advances and other borrowings | 27,310 | 3,071
Derivative financial instruments | $ 0 | $ 527

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- 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 + Details
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