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Prepaid Expenses and Other Current Assets (Tables) | 12 Months Ended
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Dec. 31, 2015
Prepaid Expense and Other Assets, Current [Abstract] |
Schedule of prepaid expenses and other current assets |
​ | ​ | ​ | December 31, | ​
​ | ​ | ​ | 2014 | ​ | ​ | 2015 | ​
Research and development tax credit receivable | ​ | ​ | ​ | $ | 3,017 | ​ | ​ | ​ | ​ | $ | 2,093 | ​ | ​
Prepayments | ​ | ​ | ​ | ​ | 902 | ​ | ​ | ​ | ​ | ​ | 893 | ​ | ​
Grant receivable | ​ | ​ | ​ | ​ | 134 | ​ | ​ | ​ | ​ | ​ | 326 | ​ | ​
VAT receivable | ​ | ​ | ​ | ​ | 309 | ​ | ​ | ​ | ​ | ​ | 607 | ​ | ​
Deposits | ​ | ​ | ​ | ​ | 132 | ​ | ​ | ​ | ​ | ​ | 132 | ​ | ​
Other current assets | ​ | ​ | ​ | ​ | 146 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​
​ | ​ | ​ | ​ | $ | 4,640 | ​ | ​ | ​ | ​ | $ | 4,051 | ​ | ​
​

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- Definition Tabular disclosure of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer; the aggregate carrying amount of current assets, not separately presented elsewhere in the balance sheet; and other deferred costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- References No definition available. + Details
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