Note 8 - Loans Receivable, Net - Accrued Interest Writeoff (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2023
Accrued Interest, Writeoff	$ 696	$ 13,933
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Accrued Interest, Writeoff	0	2,882
Commercial Real Estate Portfolio Segment [Member] | Residential Mortgage [Member]
Accrued Interest, Writeoff	0	6,814
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member]
Accrued Interest, Writeoff	0	1,461
Commercial and Agricultural Loans [Member]
Accrued Interest, Writeoff	0	1,103
Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member]
Accrued Interest, Writeoff	0	66
Consumer Portfolio Segment [Member] | Other Consumer Loans [Member]
Accrued Interest, Writeoff	$ 696	$ 1,607