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Goodwill - Schedule of Goodwill Activity (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2015
Goodwill [Line Items]      
Beginning balance $ 22,208 $ 23,532  
Additions   919  
Net foreign currency translation (1,686) (2,243)  
Ending balance 80,853 22,208  
December 31, 2015 balance at cost     $ 81,683
Accumulated amortization     (830)
Ending balance 22,208 $ 23,532 $ 80,853
Silanis Technology Inc [Member]      
Goodwill [Line Items]      
Additions $ 60,331