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IPO Related Expenses | 12 Months Ended
--- | ---
Dec. 31, 2017
Disclosure Of Initial Public Offering Related Expenses [Abstract] |
IPO Related Expenses | 5. IPO related expenses
|  | 2017 |  |  | 2016 |  |  | 2015 |
|  | (in thousands) |
|  | £ |  |  | £ |  |  | £ |
IPO related expenses |  |  | 1,794 |  |  |  | — |  |  |  | — |
IPO related costs primarily relate to legal, accounting and other advisors’ fees in relation to the Company’s listing on Nasdaq which was completed on October 2, 2017.

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- Definition Initial public offering related expenses. + References No definition available. + Details
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- Definition The entire disclosure for the initial public offering related expenses. + References No definition available. + Details
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