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Overview and Basis of Presentation - Additional Information (Details)
$ / shares in Units, $ in Thousands, shares in Millions
1 Months Ended 3 Months Ended 6 Months Ended
Mar. 31, 2015
USD ($)
$ / shares
shares
Jun. 30, 2016
Customer
$ / shares
Jun. 30, 2015
Customer
Jun. 30, 2016
USD ($)
customer
$ / shares
Jun. 30, 2015
USD ($)
Customer
Overview And Basis Of Presentation [Line Items]          
Year founded       2007  
Reincorporated date       Apr. 30, 2009  
Share price | $ / shares   $ 26.38   $ 26.38  
Proceeds from follow-on public offering, net of issuance costs       $ 0 $ 190,110
Customer Concentration Risk | Accounts Receivable          
Overview And Basis Of Presentation [Line Items]          
Number of customers | customer       0  
Percentage of total revenue or receivables, floor       10.00%  
Customer Concentration Risk | Sales Revenue, Net          
Overview And Basis Of Presentation [Line Items]          
Number of customers   0 0 0 0
Percentage of total revenue or receivables, floor       10.00%  
Customer Concentration Risk | Sales Revenue, Net | Maximum          
Overview And Basis Of Presentation [Line Items]          
Percentage of total revenue or receivables, floor   10.00% 10.00%   10.00%
Follow On Public Offering          
Overview And Basis Of Presentation [Line Items]          
Shares of common stock sold in initial public offering | shares 8.8        
Share price | $ / shares $ 22.75        
Proceeds from follow-on public offering, net of issuance costs $ 190,100        
Underwriting discounts and commission on IPO 8,700        
Offering expenses $ 900