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Assets and Liabilities Measured at Fair Value - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Recurring [Member] - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Derivative Instruments Liabilities [Member]    
Liabilities [Abstract]    
Total Liabilities $ 3,785 $ 225
Level 3 [Member] | Derivative Instruments Liabilities [Member]    
Liabilities [Abstract]    
Total Liabilities 3,785 225
Money Market Funds [Member]    
Assets [Abstract]    
Total Assets 1,943 1,943
Money Market Funds [Member] | Level 1 [Member]    
Assets [Abstract]    
Total Assets $ 1,943 $ 1,943