Note 3 - Loans and Allowance for Loan Losses (Details Textual) - USD ($)	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	$ 0	$ 0
Loans and Leases Receivable, Net Amount, Total	811,512,612	$ 742,149,271
Weighted Average Interest Rate On Loans Receivable		4.50%	4.45%
Mortgage Receivable [Member]
Servicing Asset at Amortized Cost, Ending Balance	20,621	$ 24,868
Commercial Loans [Member]
Servicing Asset at Amortized Cost, Ending Balance	79,730,096	62,261,930
Substandard [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	2,100,000	2,500,000
Commercial Portfolio Segment [Member] \| SBA CARES Act Paycheck Protection Program [Member]
Loans and Leases Receivable, Net Amount, Total	$ 1,300,000	$ 37,300,000

The weighted-average interest rate on outstanding loans receivable.

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- Definition

The recorded balance, net of any applicable reductions (for example, unamortized accretable yield and allowance for loan losses). This relates to loans not accounted for debt securities with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

+ References

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- Definition

Reflects the amount of the write-down related to a troubled debt restructuring.

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- Definition

Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

+ References

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- Definition

Amortized amount of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

+ References

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