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Note 3 - Loans and Allowance for Loan Losses (Details Textual)	3 Months Ended
	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)
Provision for Loan, Lease, and Other Losses, Total	$ 250,000	$ 775,000
Financing Receivable, Modifications, Number of Contracts	7	0
Financing Receivable, Number of Payment Deferrals	17
Financing Receivable, Deferred Payments	$ 1,200,000
Financing Receivable, Deferred Payments, Remained Active	$ 1,200,000
Maximum [Member]
Financing Receivable, Number of Payment Deferrals, Remained Active	17

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- Definition

Deferred amounts on loans receivable related to loan modification programs offered to financial institution customers affected by COVID-19.

+ References

No definition available.

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- Definition

The outstanding balance of deferred payment loan that remained active.

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- 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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- Definition

Number of payment deferral loans that remained active.

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- Definition

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

+ References

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-Topic 310
-SubTopic 10
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- Definition

Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

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