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Note 3 - Loans and Allowance for Loan Losses (Details Textual)	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Mortgage Loans in Process of Foreclosure, Amount	$ 813,000	$ 337,000
Financing Receivable, Modifications, Number of Contracts	11	0
Financing Receivable, Number of Payment Deferrals		750
Loans and Leases Receivable, Deferred Income, Total		$ 148,000,000
Past Due 30 Days or More [Member]
Financing Receivable, Modifications, Number of Contracts		0
Performing Financial Instruments [Member]
Financing Receivable, Threshold Period Past Due (Day)	90 days
Nonperforming Financial Instruments [Member]
Financing Receivable, Threshold Period Past Due (Day)	90 days

X

- Definition

Number of principal and interest payment deferrals on loans receivable related to loan modification programs offered to financial institution customers affected by COVID-19.

+ References

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Number of financing receivables that have been modified by troubled debt restructurings.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
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Threshold period for when financing receivable is considered past due, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Excludes threshold period past due to write off as uncollectible.

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Amount of deferred interest and fee income, unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of acquired loans. Excludes amounts for loans and leases covered under loss sharing agreements.

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-SubTopic 210
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Recorded investment of consumer mortgage loan receivables secured by residential real estate properties for which formal foreclosure proceedings are in process.

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