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Note 2 - Acquisition of King Bancorp, Inc. and Its Wholly-owned Subsidiary King Southern Bank (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
May 01, 2019
Sep. 30, 2019
Sep. 30, 2019
Jun. 30, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Dec. 31, 2017
Goodwill, Ending Balance   $ 12,593 $ 12,593 $ 12,826 $ 682 $ 682 $ 682 $ 682
King Bancorp Inc. [Member]                
Payments to Acquire Businesses, Gross $ 28,000              
Goodwill, Ending Balance $ 11,911 12,000 12,000          
Business Acquisition, Pro Forma Revenue   $ 1,500 $ 2,600