Financial Risk Management Objectives (Tables)

12 Months Ended

Dec. 31, 2017

Summary of Maturity Profile of Financial Liabilities Based on Contractual Undiscounted Payment Obligations

The table below summarizes the maturity profile of the Company’s financial liabilities based on contractual undiscounted payment obligations.

	< 1 year		2 to 3 years		4 to 5 years		> 5 years		Total
	US$’000		US$’000		US$’000		US$’000		US$’000
As of December 31, 2017
Financial liabilities
Interest-bearing loans and borrowings		41,461		—		—		—		41,461
Trade and other payables		28,850		—		—		—		28,850
Due to related parties		5,805		—		—		—		5,805
Due to immediate holding company		1,537		—		—		—		1,537
Other current financial liabilities - at fair value through profit or loss		139		—		—		—		139
Finance lease liability		39		27		15		2		83
		77,831		27		15		2		77,875

As of December 31, 2016
Financial liabilities
Interest-bearing loans and borrowings		28,454		—		—		—		28,454
Trade and other payables		30,023		—		—		—		30,023
Due to related parties		3,096		—		—		—		3,096
Due to immediate holding company		1,537		—		—		—		1,537
Finance lease liability		32		49		8		—		89
		63,142		49		8		—		63,199

Summary of Capital Management

In line with industry practices, the Company monitors capital using a gearing ratio, which is net debt divided by total capital plus net debt. The Company includes within net debt, interest bearing loans and borrowings, trade and other payables, less cash and cash equivalents.

	As of December 31,
	2017			2016
	US$’000			US$’000
Interest bearing loans and borrowings		41,151			28,225
Trade and other payables		28,850			30,023
Less: cash and cash equivalents		(46,093	)		(48,231	)
Net debt		23,908			10,017
Total Equity		222,826			197,175
Capital and net debt		246,734			207,192
Gearing ratio		9.7	%		4.8	%

Foreign currency risk [Member]

Statements [Line Items]

Summary of Balance of Financial Assets and Liabilities Denominated in a Currency Different from the Company's Reporting Currency

The balance of financial assets and liabilities denominated in a currency different from the Company’s reporting currency are summarized below.

	Financial Assets				Financial Liabilities
	As of December 31,				As of December 31
	2017		2016		2017		2016
Thai Baht (THB)		354		354		30		30
Singapore dollar (SGD)		39		127		58		23
Taiwan dollar (TWD)		5,927		1,602		1,705		2,201
Renminbi (RMB)		115,545		88,477		21,961		12,965
Hong Kong dollar (HKD)		31,578		19,840		42		63
Australian dollar (AUD)		766		919		—		—
Japanese yen (JPY)		—		—		—		14,978

Sensitivity of Profit Before Tax and Equity to a Reasonably Possible Change of Relevant Risk Variable

Foreign currency sensitivity

The following table demonstrates the sensitivity of the Company’s profit before tax and equity to a reasonably possible change of each foreign currency exchange rates against the US dollar, with all other variables held constant.

	Change rate			THB		SGD			TWD			RMB			HKD			AUD			JPY
		5	%		—		4			(1	)		541			128			34			(6	)
2016		-5	%		—		(4	)		1			(541	)		(127	)		(34	)		6

		5	%		—		(1	)		7			718			202			30			—
2017		-5	%		—		1			(7	)		(718	)		(202	)		(30	)		—

Commodity price risk: Copper [Member]

Statements [Line Items]

Sensitivity of Profit Before Tax and Equity to a Reasonably Possible Change of Relevant Risk Variable

Commodity price sensitivity

The following table shows the potential effect of price changes in copper.

	Change in year-end price			Effect on profit before tax			Effect on equity
	US$’000			US$’000			US$’000
2017		+44	%		11,282		N/A
Copper		-44	%		(11,282	)	N/A

2016		+25	%		6,302		N/A
Copper		-25	%		(6,302	)	N/A