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Fair Value Measurements (Details Textuals) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Derivative Asset $ 800  
Cash Equivalents 33,000 $ 21,500
Change in Carrying Value Verse Fair Value of Long Term Debt 4,100 4,200
Fair Value, Measurements, Recurring [Member]    
Liabilities at Fair Value $ 5,909 $ 5,753