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Note 15 - Fair Value Measurements - Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Securities available-for-sale	$ 831,003	$ 596,999
Accrued income receivable	10,124	11,143
Reported Value Measurement [Member]
Securities available-for-sale	831,003	596,999
Estimate of Fair Value Measurement [Member]
Securities available-for-sale	831,003	596,999
Fair Value, Inputs, Level 1 [Member] | Reported Value Measurement [Member]
Cash and cash equivalents	89,129	173,097
Accrued income receivable	10,124	11,143
Securities sold under agreements to repurchase	39,851	37,293
Accrued interest payable	353	829
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member]
Cash and cash equivalents	89,129	173,097
Accrued income receivable	10,124	11,143
Securities sold under agreements to repurchase	39,851	37,293
Accrued interest payable	353	829
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member]
Interest-bearing time deposits	16,922	18,426
FHLB and FRB stock	3,422	3,148
Loans receivable, net	1,144,108	1,129,505
Loans held for sale	0	1,621
Deposits	1,878,019	1,716,446
FHLB advances	3,000	3,000
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member]
Interest-bearing time deposits	16,922	18,426
FHLB and FRB stock	3,422	3,148
Loans receivable, net	1,112,684	1,116,352
Loans held for sale	0	1,621
Deposits	1,880,137	1,720,023
FHLB advances	$ 3,071	$ 3,111

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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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- Definition

The fair value disclosure of interest bearing deposits.

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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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- Definition

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.

+ References

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- Definition

Fair value portion of borrowing from Federal Home Loan Bank (FHLBank).

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-SubTopic 210
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Amount of interest payable on debt, including, but not limited to, trade payables.

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-Publisher FASB
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-Topic 942
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Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable.

+ References

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- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-URI http://asc.fasb.org/subtopic&trid=2196772

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- Definition

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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=123594938&loc=d3e13433-108611

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