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Note 10 - Interest Rate Swap Derivatives - Offsetting of Derivative Liabilities (Details) - Interest Rate Swap [Member] - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Gross amounts of recognized liabilities $ 711 $ 1,417
Gross amounts offset in the balance sheet (19)
Net amounts of liabilities presented in the balance sheet 692 1,417
Gross amounts not offset in the balance sheet cash collateral posted (550) (2,910)
Gross amounts not offset in the balance sheet net amount 142 (1,493)
Counter Party 1 [Member]    
Gross amounts of recognized liabilities 514 1,049
Gross amounts offset in the balance sheet (19)
Net amounts of liabilities presented in the balance sheet 495 1,049
Gross amounts not offset in the balance sheet cash collateral posted (380) (2,170)
Gross amounts not offset in the balance sheet net amount 115 (1,121)
Counter Party 2 [Member]    
Gross amounts of recognized liabilities 197 368
Gross amounts offset in the balance sheet
Net amounts of liabilities presented in the balance sheet 197 368
Gross amounts not offset in the balance sheet cash collateral posted (170) (740)
Gross amounts not offset in the balance sheet net amount $ 27 $ (372)