XML 115 R103.htm IDEA: XBRL DOCUMENT v3.7.0.1
Long-lived Assets (Property And Equipment, net) by Geographic Area (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Segment Reporting Information [Line Items]      
Property and equipment, net $ 47,892 $ 50,469 $ 35,537
Taiwan      
Segment Reporting Information [Line Items]      
Property and equipment, net 34,011 32,014 28,739
United States      
Segment Reporting Information [Line Items]      
Property and equipment, net 237 274 142
Korea      
Segment Reporting Information [Line Items]      
Property and equipment, net 1,448 1,891 2,477
China      
Segment Reporting Information [Line Items]      
Property and equipment, net 12,181 16,268 4,163
Japan      
Segment Reporting Information [Line Items]      
Property and equipment, net $ 15 $ 22 $ 16