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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

Represents the fair value of FHLB and FRB stock, as of the balance sheet date.

+ References

No definition available.

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The fair value disclosure of interest bearing deposits.

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Fair value portion of interest receivable.

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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))
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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Fair value portion of borrowing from Federal Home Loan Bank (FHLBank).

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
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Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.

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Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

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Fair value portion of securities that an entity sells and agrees to repurchase at a specified date for a specified price.

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