Inventory	12 Months Ended
Dec. 31, 2017
Inventory [Abstract]
Inventory	14. Inventory At each period end, inventory is reviewed to ensure that it is recorded at the lower of cost and net realizable value. During the year ended December 31, 2017, the Company recorded an inventory write-down of $834,000 (2016: $3,084,000; 2015: $480,000). Of inventory held at December 31, 2017, 99% is expected to be sold prior to the end of March 2018 with the remainder to be sold by the end of April 2018 (December 31, 2016: 93% sold by the end of March 2017 with the remainder sold by the end of June 2017).

Inventory

12 Months Ended

Dec. 31, 2017

14. Inventory

At each period end, inventory is reviewed to ensure that it is recorded at the lower of cost and net realizable value. During the year ended December 31, 2017, the Company recorded an inventory write-down of $834,000 (2016: $3,084,000; 2015: $480,000).

Of inventory held at December 31, 2017, 99% is expected to be sold prior to the end of March 2018 with the remainder to be sold by the end of April 2018 (December 31, 2016: 93% sold by the end of March 2017 with the remainder sold by the end of June 2017).