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Note 6 - Premises and Equipment (Details Textual) - USD ($)
1 Months Ended 12 Months Ended
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Proceeds from Sale of Property, Plant, and Equipment, Total $ 1,500,000 $ 1,464,000 $ 0 $ 0
Gain (Loss) on Disposition of Property Plant Equipment, Total $ 550,000 550,000 (0) (0)
Depreciation, Total   $ 1,400,000 $ 1,500,000 $ 1,600,000