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, 2020
Mar. 31, 2019
Dec. 31, 2019
Property, Plant and Equipment [Line Items]      
Property and equipment, gross $ 75,930   $ 75,956
Less accumulated depreciation and amortization (60,179)   (59,343)
Property and equipment, net 15,751   16,613
Depreciation $ 1,600 $ 2,100  
Furniture and fixtures      
Property, Plant and Equipment [Line Items]      
Useful life 5 years    
Property and equipment, gross $ 2,206   2,199
Machinery and equipment      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross $ 36,851   35,660
Machinery and equipment | Minimum      
Property, Plant and Equipment [Line Items]      
Useful life 3 years    
Machinery and equipment | Maximum      
Property, Plant and Equipment [Line Items]      
Useful life 5 years    
Masks and production equipment      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross $ 15,194   15,209
Masks and production equipment | Minimum      
Property, Plant and Equipment [Line Items]      
Useful life 2 years    
Masks and production equipment | Maximum      
Property, Plant and Equipment [Line Items]      
Useful life 5 years    
Software      
Property, Plant and Equipment [Line Items]      
Useful life 3 years    
Property and equipment, gross $ 6,118   5,956
Leasehold improvements      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross $ 15,255   16,186
Leasehold improvements | Minimum      
Property, Plant and Equipment [Line Items]      
Useful life 1 year    
Leasehold improvements | Maximum      
Property, Plant and Equipment [Line Items]      
Useful life 5 years    
Construction in progress      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross $ 306   $ 746