Quarterly report pursuant to Section 13 or 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
9 Months Ended
Sep. 30, 2012
Dec. 31, 2011
Property, Plant and Equipment [Line Items]    
Property and equipment, Gross $ 14,059 $ 11,482
Less accumulated depreciation and amortization (7,785) (5,988)
Property and equipment, net 6,274 5,494
Furniture and fixtures [Member]
   
Property, Plant and Equipment [Line Items]    
Useful life in years 5 years  
Property and equipment, Gross 345 305
Machinery and equipment [Member]
   
Property, Plant and Equipment [Line Items]    
Property and equipment, Gross 8,200 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 3,950 3,249
Software [Member]
   
Property, Plant and Equipment [Line Items]    
Useful life in years 3 years  
Property and equipment, Gross 688 558
Leasehold improvements [Member]
   
Property, Plant and Equipment [Line Items]    
Property and equipment, Gross 544 489
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 $ 332 $ 6