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Note 11 - Advances from Federal Home Loan Bank (Details Textual) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Advances from Federal Home Loan Banks $ 10,000 $ 0
Federal Home Loan Bank, Advances, Activity for Year, Average Interest Rate at Period End 1.67%  
Residential Mortgage Segment [Member]    
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged $ 66,500