Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Research and Development Expenditure (Details)

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Summary of Significant Accounting Policies - Research and Development Expenditure (Details) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Dec. 31, 2015
Dec. 31, 2016
Jun. 30, 2015
Jun. 30, 2014
Summary of Significant Accounting Policies        
Acquired in-process R&D expensed $ 2,500 $ 3,000 $ 0 $ 0
Grant income 905 414 613 241
Reimbursement of Research and Development Tax and Expenditure Credit $ 1,506 $ 6,891 $ 1,497 $ 1,027