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Note 19 - Financial Instruments (Details Textual) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Interest Rate Derivative Liabilities, at Fair Value $ 7,741 $ 15,314
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value   $ 85
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value $ 416