Note 6 - Loan Servicing (Details Textual)	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Servicing Asset	$ 8,439,000		$ 8,439,000		$ 9,521,000
Loan Servicing Fees Net of Amortization	623,000	$ 724,000	1,959,000	$ 1,628,000
Mortgages [Member]
Servicing Asset	16,600,000		16,600,000		18,300,000
Small Business Administration Loans [Member]
Servicing Asset	$ 2,900,000		$ 2,900,000		$ 3,500,000
Measurement Input, Prepayment Rate [Member]
Servicing Asset, Measurement Input	0.0759		0.0759		0.0771
Measurement Input, Mortgage Rate [Member]
Servicing Asset, Measurement Input	0.0728		0.0728		0.0648
Measurement Input, Risk Free Interest Rate [Member] | Weighted Average [Member]
Servicing Asset, Measurement Input	0.0423		0.0423		0.0414