Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Schedule of Research and Development Expenses (Details)

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Summary of Significant Accounting Policies - Schedule of Research and Development Expenses (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Accounting Policies [Abstract]        
Research and development expense, gross $ 3,820 $ 1,823 $ 7,801 $ 3,143
Less: Reimbursement of research and development expense 538 0 732 0
Research and development expense, net of reimbursements $ 3,282 $ 1,823 $ 7,069 $ 3,143