Note 8 - Other Real Estate Owned - Schedule of Other Real Estate (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Balance	$ 120,000	$ 130,000
Additions	0	0
Sales	(105,000)	0
Write-downs	(15,000)	(10,000)
Balance	$ 0	$ 120,000