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Note 6 - Fair Value Measurements (Details Textual) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2022
Dec. 31, 2021
Loans Held-for-sale [Member] | Changes Measurement [Member] | Fair Value, Nonrecurring [Member]    
Assets, Fair Value Adjustment $ 0 $ 0
Interest Rate Contract [Member]    
Derivative, Fair Value, Net, Total   0
Forward Contract [Member]    
Derivative, Fair Value, Net, Total   $ 0