Annual report pursuant to Section 13 and 15(d)

Balance Sheet Details - Property and Equipment (Detail)

v2.4.0.6
Balance Sheet Details - Property and Equipment (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 $ 15,165 $ 11,482
Less accumulated depreciation and amortization (8,299) (5,988)
Property and equipment, net 6,866 5,494
Minimum [Member]
   
Property, Plant and Equipment [Line Items]    
Useful life in years 2 years  
Maximum [Member]
   
Property, Plant and Equipment [Line Items]    
Useful life in years 5 years  
Furniture and fixtures [Member]
   
Property, Plant and Equipment [Line Items]    
Useful life in years 5 years  
Property and equipment, Gross 355 305
Machinery and equipment [Member]
   
Property, Plant and Equipment [Line Items]    
Property and equipment, Gross 8,331 6,875
Machinery and equipment [Member] | Minimum [Member]
   
Property, Plant and Equipment [Line Items]    
Useful life in years 3 years  
Machinery and equipment [Member] | Maximum [Member]
   
Property, Plant and Equipment [Line Items]    
Useful life in years 5 years  
Masks and production equipment [Member]
   
Property, Plant and Equipment [Line Items]    
Useful life in years 2 years  
Property and equipment, Gross 4,894 3,249
Software [Member]
   
Property, Plant and Equipment [Line Items]    
Useful life in years 3 years  
Property and equipment, Gross 736 558
Leasehold improvements [Member]
   
Property, Plant and Equipment [Line Items]    
Property and equipment, Gross 829 489
Leasehold improvements [Member] | Minimum [Member]
   
Property, Plant and Equipment [Line Items]    
Useful life in years 4 years  
Leasehold improvements [Member] | Maximum [Member]
   
Property, Plant and Equipment [Line Items]    
Useful life in years 5 years  
Construction in progress [Member]
   
Property, Plant and Equipment [Line Items]    
Property and equipment, Gross $ 20 $ 6