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Note 4 - Credit Quality (Details Textual)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
USD ($)
Jun. 30, 2021
USD ($)
Jun. 30, 2022
USD ($)
Jun. 30, 2021
USD ($)
Financing Receivable, Nonaccrual, Interest Income $ 1 $ 15 $ 3 $ 24
Performing Status Returned Period (Month)     6 months  
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts     1 0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default     $ 39