Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Commitments and contingencies [abstract]

Schedule of capital expenditures

	31/12/2017		31/12/2018
	US$’000		US$’000
Office building		783		374
Property and equipment		306		301

Schedule of future minimum rentals payable under non–cancellable operating leases

	31/12/2017		31/12/2018
	US$’000		US$’000
Within one year		1,080		738
After one year but not more than five years		768		228
		1,848		966

Schedule of future minimum rentals receivable under non–cancellable operating leases

	31/12/2017		31/12/2018
	US$’000		US$’000
Within one year		308		566
After one year but not more than five years		515		594
		823		1,160

Schedule of future minimum lease payments under finance leases

	31/12/2017							31/12/2018
	Minimum payments		Interest			Present value of payments		Minimum payments		Interest			Present value of payments
	US$’000		US$’000			US$’000		US$’000		US$’000			US$’000
Within one year		56		(7	)		49		55		(2	)		53
After one year but not more than five years		62		(4	)		58		4		–			4
		118		(11	)		107		59		(2	)		57