Contract Liabilities (Tables)

12 Months Ended

Dec. 31, 2018

Contract liabilities [abstract]

Schedule of consideration received from customers

	31/12/2017		31/12/2018
	US$’000		US$’000
Advances from customers		2,925		3,084
Customer loyalty credits		379		516
Sell back liabilities		122		697
		3,426		4,297