INVENTORIES (Tables)

12 Months Ended

Dec. 31, 2017

Classes of current inventories [abstract]

Schedule of Inventories

	December 31, 2017 US$‘000		December 31, 2016 US$‘000
Raw materials and consumables		10,345		9,176
Work-in-progress		7,236		7,288
Finished goods		15,224		16,125
		32,805		32,589

Schedule of Movement on Inventory Provision

The movement on the inventory provision for the three year period to December 31, 2017 is as follows:

	December 31, 2017 US$‘000			December 31, 2016 US$‘000			December 31,2015 US$‘000
Opening provision at January 1		10,017			4,822			4,636
Charged during the year		2,561			6,390			892
Utilised during the year		(4,749	)		(1,065	)		(666	)
Released during the year		(286	)		(130	)		(40	)
Closing provision at December 31		7,543			10,017			4,822