Geographic and Segment Information - Additional Information (Detail)	3 Months Ended			6 Months Ended
	Jun. 30, 2015 Customer Segments	Mar. 31, 2015 Segments	Jun. 30, 2014 Customer	Jun. 30, 2015 Customer Segments	Jun. 30, 2014 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	2		1	3	0
Customer Concentration Risk [Member] | Net Sales [Member] | Minimum [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage					10.00%
Customer Concentration Risk [Member] | Net Sales [Member] | Top Ten Customers [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	65.00%		59.00%	66.00%	57.00%
Number of customers	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	14.80%		10.50%	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%			11.30%
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%