Quarterly report pursuant to Section 13 or 15(d)

Balance Sheet Details - Property and Equipment (Details 3)

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Balance Sheet Details - Property and Equipment (Details 3) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Property, Plant and Equipment [Line Items]    
Property and equipment, Gross $ 53,555 $ 53,463
Less accumulated depreciation and amortization (34,393) (32,914)
Property and equipment, net $ 19,162 20,549
Furniture and fixtures [Member]    
Property, Plant and Equipment [Line Items]    
Useful life 5 years  
Property and equipment, Gross $ 1,988 1,983
Machinery and equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, Gross $ 27,632 27,028
Machinery and equipment [Member] | Minimum [Member]    
Property, Plant and Equipment [Line Items]    
Useful life 3 years  
Machinery and equipment [Member] | Maximum [Member]    
Property, Plant and Equipment [Line Items]    
Useful life 5 years  
Masks and production equipment [Member]    
Property, Plant and Equipment [Line Items]    
Useful life 2 years  
Property and equipment, Gross $ 8,418 9,153
Software and Software Development Costs [Member]    
Property, Plant and Equipment [Line Items]    
Useful life 3 years  
Property and equipment, Gross $ 3,701 3,625
Leasehold improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, Gross $ 11,670 11,635
Leasehold improvements [Member] | Minimum [Member]    
Property, Plant and Equipment [Line Items]    
Useful life 1 year  
Leasehold improvements [Member] | Maximum [Member]    
Property, Plant and Equipment [Line Items]    
Useful life 5 years  
Construction in progress [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, Gross $ 146 $ 39