Note 3 - Loans and Allowance for Loan Losses - Loans by Category (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Loans receivable	$ 822,585,937	$ 753,408,413
Allowance for loan losses	(10,588,562)	(9,617,024)	$ (7,608,000)	$ (7,996,000)
Deferred loan fees/costs, net	(484,763)	(1,642,118)
Net loans	811,512,612	742,149,271
Residential Portfolio Segment [Member] \| Real Estate Residential, One To Four Family Units [Member]
Loans receivable	102,791,228	115,799,200
Allowance for loan losses	(1,112,000)	(1,445,000)	(1,001,000)	(1,297,000)
Residential Portfolio Segment [Member] \| Real Estate Residential, Multi Family Units [Member]
Loans receivable	76,565,222	90,028,775
Allowance for loan losses	(750,000)	(1,058,000)	(746,000)	(641,000)
Real Estate, Construction [Member]
Loans receivable	124,848,581	70,847,330
Allowance for loan losses	(2,538,000)	(1,132,000)	(1,749,000)	(2,306,000)
Commercial Real Estate Portfolio Segment [Member]
Loans receivable	381,119,167	305,673,212
Allowance for loan losses	(4,407,000)	(3,624,000)	(2,267,000)	(2,093,000)
Commercial Portfolio Segment [Member]
Loans receivable	115,794,005	144,326,350
Allowance for loan losses	(1,177,000)	(1,129,000)	$ (1,129,000)	$ (1,160,000)
Consumer and Other Loans [Member]
Loans receivable	$ 21,467,734	$ 26,733,546

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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