Note 8 - Loans Receivable, Net - Schedule of Loans (Details) - USD ($)	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Loans	$ 601,323,789		$ 560,987,903
Held for investment, allowance for credit loss	12,283,325	$ 12,126,810	11,177,753	$ 11,197,954	$ 11,128,963	$ 11,087,164
Deferred Loan Fees	595,832		806,238
Financing Receivable, Allowance for Credit Loss and Deferred Loan Fees	12,879,157		11,983,991
Total Loans Receivable, Net	588,444,632		549,003,912
Commercial Real Estate Portfolio Segment [Member] \| Construction Loans [Member]
Loans	104,251,639		112,793,694
Held for investment, allowance for credit loss	2,200,850	2,345,958	2,323,397	2,104,386	2,336,583	2,401,196
Commercial Real Estate Portfolio Segment [Member] \| Residential Mortgage [Member]
Loans	145,685,427		110,056,973
Held for investment, allowance for credit loss	3,260,891	3,072,377	2,124,835	1,870,696	1,628,316	1,663,423
Commercial Real Estate Portfolio Segment [Member] \| Commercial Real Estate [Member]
Loans	259,912,832		252,154,475
Held for investment, allowance for credit loss	4,427,006	4,263,822	4,804,282	4,736,314	4,932,948	4,832,440
Commercial and Agricultural Loans [Member]
Loans	34,264,896		30,647,975
Held for investment, allowance for credit loss	1,102,070	1,130,753	874,092	1,403,818	1,242,919	1,241,828
Consumer Portfolio Segment [Member] \| Home Equity Line of Credit [Member]
Loans	32,367,179		31,736,676
Held for investment, allowance for credit loss	654,278	671,526	598,807	606,847	555,403	517,512
Consumer Portfolio Segment [Member] \| Other Consumer Loans [Member]
Loans	24,841,816		23,598,110
Held for investment, allowance for credit loss	$ 638,230	$ 642,374	$ 452,340	$ 475,893	$ 432,794	$ 430,765

Amount of allowance for credit loss and deferred loan fees for financing receivables.

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Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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Amortized cost, before allowance for credit loss, fee, and loan in process, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

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Amount of fee received for commitment to originate or purchase financing receivable where likelihood of commitment being exercised is remote, to be recognized as service income.

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Amortized cost, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

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