| Accrued expenses and other current liabilities | 9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sep. 30, 2017 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accrued expenses and other current liabilities | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accrued expenses and other current liabilities | 
 Note 8 — Accrued expenses and other current liabilities 
 Accrued expenses and other current liabilities consisted of the following (in thousands): 
 
 
 The Company typically has a receivable for VAT. At September 30, 2017 and December 31, 2016, there was a VAT payable due to VAT arising on the milestone payments invoiced to GSK in the previous quarter. 
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