Note 10 - Derivatives and Risk Management Activities - Amounts Recorded in Statement of Financial Condition (Details) - Not Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Other Assets [Member] | Best Efforts Forward Loan sales Commitments [Member]
Derivative Asset, Fair Value	$ 74	$ 5
Derivative Asset, Notional Amount	7,248	3,222
Other Assets [Member] | Mandatory Forward Loan Sales Commitments [Member]
Derivative Asset, Fair Value	54	5
Derivative Asset, Notional Amount	3,836	1,667
Other Assets [Member] | Interest Rate Lock Commitments [Member]
Derivative Asset, Fair Value	107	378
Derivative Asset, Notional Amount	7,853	14,419
Other Liabilities [Member] | Best Efforts Forward Loan sales Commitments [Member]
Derivative Liability, Fair Value	7	96
Derivative Liability, Notional Amount	1,884	11,197
Other Liabilities [Member] | Mandatory Forward Loan Sales Commitments [Member]
Derivative Liability, Fair Value	0	44
Derivative Liability, Notional Amount	0	6,460
Other Liabilities [Member] | Interest Rate Lock Commitments [Member]
Derivative Liability, Fair Value	9	0
Derivative Liability, Notional Amount	$ 1,279	$ 0