Note 5 - Mortgage Servicing Rights - Valuation Assumptions (Details) - Mortgage Servicing Rights [Member]	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Weighted average discount rate	9.40%	9.60%
Conditional prepayment rate (“CPR”)	7.20%	8.20%
Weighted average life in years (Year)	8 years 4 months 24 days	7 years 9 months 18 days