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Basic and Diluted Loss Per Share (Tables) | 12 Months Ended
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Dec. 31, 2017
Earnings Per Share [Abstract] |
Schedule of Basic and Diluted Loss Per Share |
|  | 2017 |  |  | 2016 |  |  | 2015 |  |
|  | (in thousands, except per share data)
|  | £ |  |  | £ |  |  | £ |  |
Loss for the year |  |  | (23,085 | ) |  |  | (6,049 | ) |  |  | (5,332 | ) |
Basic and diluted weighted average number of shares |  |  | 26,069 |  |  |  | 24,107 |  |  |  | 24,101 |  |
|  | £ |  |  | £ |  |  | £ |  |
Basic and diluted loss per share |  |  | (0.89 | ) |  |  | (0.25 | ) |  |  | (0.22 | ) |

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- Definition The disclosure of earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2017-01-01 -Paragraph 66 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=33&date=2017-03-01&anchor=para_66&doctype=Standard -URIDate 2017-03-09 + Details
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