Note 7 - Intangible Assets and Loan Servicing (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Intangible Assets and Loan Servicing Details [Line Items]
Servicing asset loans unpaid principal balance	$ 68,349,000	$ 75,205,000
Servicing asset at fair value, amount	$ 585,000	$ 638,000
Minimum [Member]
Intangible Assets and Loan Servicing Details [Line Items]
Servicing assets and servicing liabilities at fair value, assumptions used to estimate fair value, discount rate	12.00%	12.00%
Minimum [Member] | Measurement Input, Prepayment Rate
Intangible Assets and Loan Servicing Details [Line Items]
Prepayment speeds	104.00%	113.00%
Maximum [Member]
Intangible Assets and Loan Servicing Details [Line Items]
Servicing assets and servicing liabilities at fair value, assumptions used to estimate fair value, discount rate	12.50%	12.50%
Maximum [Member] | Measurement Input, Prepayment Rate
Intangible Assets and Loan Servicing Details [Line Items]
Prepayment speeds	214.00%	235.00%
Other Assets [Member]
Intangible Assets and Loan Servicing Details [Line Items]
Servicing asset at fair value, amount	$ 583,000	$ 638,000