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Geographic and Segment Information - Additional Information (Detail)
3 Months Ended 6 Months Ended
Jun. 30, 2016
Customer
Jun. 30, 2015
Customer
Segments
Mar. 31, 2015
Segments
Jun. 30, 2016
Customer
Segments
Jun. 30, 2015
Customer
Revenues from External Customers and Long-Lived Assets [Line Items]          
Number of operating segments | Segments   2   2  
As Previously Reported [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Number of operating segments | Segments     1    
Customer Concentration Risk [Member] | Net Sales [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Number of customers greater than ten percent threshold | Customer 1 2   2 3
Customer Concentration Risk [Member] | Net Sales [Member] | Top Ten Customers [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Concentration risk, percentage 68.00% 65.00%   65.00% 66.00%
Number of customers | Customer 10 10   10 10
Customer Concentration Risk [Member] | Net Sales [Member] | Top Customer One [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Concentration risk, percentage 29.40% 14.80%   24.30% 15.10%
Customer Concentration Risk [Member] | Net Sales [Member] | Top Customer Two [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Concentration risk, percentage   10.80%   11.00% 11.30%
Customer Concentration Risk [Member] | Net Sales [Member] | Top Customer Three [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Concentration risk, percentage         10.10%
Geographic Concentration Risk [Member] | Property, Plant and Equipment [Member] | Korea [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Concentration risk, percentage       96.00%