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Note 10 - Long-term Debt (Details Textual) - USD ($)
Dec. 31, 2016
Dec. 31, 2015
Long Term Debt [Line Items]    
Federal Home Loan Bank Stock $ 1,005,000 $ 496,000
Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available 248,199,000  
Advances from Federal Home Loan Banks   0
Federal Home Loan Bank, Advances, General Debt Obligations, Borrowings Outstanding 52,660,000 37,163,000
Other Short Term Debt [Member]    
Long Term Debt [Line Items]    
Federal Home Loan Bank, Advances, General Debt Obligations, Borrowings Outstanding [1] $ 7,321,000 $ 0
[1] Other short-term borrowings include Federal funds purchased and overnight borrowings from the FHLB.