Research and Development Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Research and development expenses
Depreciation and amortisation	$ 76	$ 45
Total	12,660	13,036
Research and development expenses
Research and development expenses
Research materials and purchased services	9,608	10,184
Staff costs	2,320	1,985
Other research and development expenses	699	838
Depreciation and amortisation	33	29
Total	12,660	13,036
Other research and development expenses
Other research and development expenses
Infrastructure expenses	300	300
Advisory and external consultancy expenses	300	300
Intellectual property and trademark related expenses	$ 100	100
Travel expenses		$ 100