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Note 3 - Loans - Schedule of Allowance for Credit Loss (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Beginning balance	$ 2,620,949	$ 2,785,949	$ 2,785,949
Provision for (recovery) of credit losses	(29,999)	0
Loans charged off	0	0
Recoveries	0	0
Total ending allowance balance	2,590,950	2,785,949	2,620,949
Commercial and Industrial [Member]
Beginning balance	20,000	22,000	22,000
Provision for (recovery) of credit losses	4,340	(1,300)
Loans charged off	0	0	0
Recoveries	0	0
Total ending allowance balance	24,340	20,700	20,000
Consumer Portfolio Segment [Member]
Beginning balance	0	0	0
Provision for (recovery) of credit losses	223	0
Loans charged off	0	0	0
Recoveries	0	0
Total ending allowance balance	223	0	0
Real Estate Loan [Member] | Residential Portfolio Segment [Member]
Beginning balance	1,680,949	1,851,969	1,851,969
Provision for (recovery) of credit losses	(20,064)	7,380
Loans charged off	0	0	0
Recoveries	0	0
Total ending allowance balance	1,660,885	1,859,349	1,680,949
Real Estate Loan [Member] | Commercial Real Estate Portfolio Segment [Member]
Beginning balance	508,000	437,180	437,180
Provision for (recovery) of credit losses	25,874	26,920
Loans charged off	0	0	0
Recoveries	0	0
Total ending allowance balance	533,874	464,100	508,000
Real Estate Loan [Member] | Multi-Family Real Estate [Member]
Beginning balance	289,000	317,300	317,300
Provision for (recovery) of credit losses	(10,084)	400
Loans charged off	0	0	0
Recoveries	0	0
Total ending allowance balance	278,916	317,700	289,000
Real Estate Loan [Member] | Construction Loans [Member]
Beginning balance	123,000	157,500	157,500
Provision for (recovery) of credit losses	(30,288)	(33,400)
Loans charged off	0	0	0
Recoveries	0	0
Total ending allowance balance	$ 92,712	$ 124,100	$ 123,000

X

- Definition

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

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X

- Definition

Amount of increase in allowance for credit loss on financing receivable from recovery.

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Amount of writeoff of financing receivable, charged against allowance for credit loss.

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