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Other non-current assets
12 Months Ended
Dec. 31, 2016
Other non-current assets  
Other non-current assets

7      Other non-current assets

        As of December 31, 2016, other assets include a refundable security deposit of $0.6 million (December 31, 2015: $0.0 million) related to the newly leased premises in Amsterdam, and a refundable security deposit related to the Lexington facility of $1.2 million (December 31, 2015: $1.2 million).