Quarterly report pursuant to Section 13 or 15(d)

Accrued expenses and other current liabilities (Details)

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Accrued expenses and other current liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Accrued expenses and other current liabilities    
Accrued purchases and clinical trial expenditure $ 8,846 $ 6,406
Accrued employee compensation and benefits payable 572 368
Other current liabilities 536 744
Total $ 9,954 $ 7,518