Annual report pursuant to Section 13 and 15(d)

Property and Equipment - Components of Property and Equipment, Net (Detail)

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Property and Equipment - Components of Property and Equipment, Net (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 112,581 $ 93,791
Less: Accumulated depreciation 44,089 27,449
Property and equipment, net 68,492 66,342
Building [Member]
   
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 778 772
Property plant and equipment useful life 27 years  
Leasehold Improvements [Member]
   
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 5,044 4,797
Machinery and Equipment [Member]
   
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 102,494 83,518
Furniture and Fixtures [Member]
   
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 835 684
Land [Member]
   
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 531 531
Construction in Progress [Member]
   
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 2,899 $ 3,489
Minimum [Member] | Leasehold Improvements [Member]
   
Property, Plant and Equipment [Line Items]    
Property plant and equipment useful life 3 years  
Minimum [Member] | Machinery and Equipment [Member]
   
Property, Plant and Equipment [Line Items]    
Property plant and equipment useful life 2 years  
Minimum [Member] | Furniture and Fixtures [Member]
   
Property, Plant and Equipment [Line Items]    
Property plant and equipment useful life 3 years  
Maximum [Member] | Leasehold Improvements [Member]
   
Property, Plant and Equipment [Line Items]    
Property plant and equipment useful life 10 years  
Maximum [Member] | Machinery and Equipment [Member]
   
Property, Plant and Equipment [Line Items]    
Property plant and equipment useful life 10 years  
Maximum [Member] | Furniture and Fixtures [Member]
   
Property, Plant and Equipment [Line Items]    
Property plant and equipment useful life 5 years