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 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Concentration Risk [Line Items]        
Revenues $ 40,778 $ 29,393 $ 118,559 $ 83,419
U.S. revenue        
Concentration Risk [Line Items]        
Revenues 32,907 22,572 91,719 65,996
Non-U.S. revenue        
Concentration Risk [Line Items]        
Revenues $ 7,871 $ 6,821 $ 26,840 $ 17,423