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Other Real Estate Owned - Changes in Other Real Estate Owned (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Note 5 - Other Real Estate Owned - Changes in Other Real Estate Owned ("OREO") (Details)      
Balance at beginning of year $ 0 $ 0 $ 533
Additions 239 638 0
Write-down of carrying value 0 0 0
Sales 0 (638) (533)
Balance at end of year $ 239 $ 0 $ 0