Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Breakdown of the Company Revenue (Details)

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Summary of Significant Accounting Policies - Breakdown of the Company Revenue (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Concentration Risk [Line Items]        
Revenues $ 44,029 $ 30,393 $ 77,781 $ 54,026
U.S. revenue        
Concentration Risk [Line Items]        
Revenues 33,458 24,237 58,812 43,424
Non-U.S. revenue        
Concentration Risk [Line Items]        
Revenues $ 10,571 $ 6,156 $ 18,969 $ 10,602