Annual report pursuant to Section 13 and 15(d)

Balance Sheet Details - Property and Equipment (Detail)

v3.10.0.1
Balance Sheet Details - Property and Equipment (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Property, Plant and Equipment [Line Items]      
Depreciation $ 11,100 $ 12,000 $ 10,600
Property and equipment, Gross 72,191 66,711  
Less accumulated depreciation and amortization (53,787) (44,053)  
Property and equipment, net $ 18,404 22,658  
Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 2 years    
Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 5 years    
Furniture and fixtures [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 5 years    
Property and equipment, Gross $ 2,020 2,105  
Machinery and equipment [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, Gross $ 34,225 33,462  
Machinery and equipment [Member] | Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 3 years    
Machinery and equipment [Member] | Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 5 years    
Masks and production equipment [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 2 years    
Property and equipment, Gross $ 12,645 11,470  
Software [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 3 years    
Property and equipment, Gross $ 5,675 4,695  
Leasehold improvements [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, Gross $ 17,493 14,340  
Leasehold improvements [Member] | Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 1 year    
Leasehold improvements [Member] | Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Useful Life 5 years    
Construction in progress [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, Gross $ 133 $ 639