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Subsequent Event - Additional Information (Detail) - Major ordinary share transactions [Member] - Charoong Thai Wire and Cable Public Company Limited [Member]
฿ / shares in Units, ฿ in Millions
Mar. 12, 2018
USD ($)
Mar. 12, 2018
THB (฿)
฿ / shares
Disclosure of non-adjusting events after reporting period [Line Items]    
Approved dividend payments to its shareholders $ 4,400,000 ฿ 139.3
Approved dividend payments to its shareholders, per share | ฿ / shares   ฿ 0.35
Dividend payment date May 15, 2018 May 15, 2018
Dividends paid to non-controlling interests | $ $ 2,200