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 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Property, Plant and Equipment [Line Items]          
Property and equipment, gross $ 72,208   $ 72,208   $ 72,191
Less accumulated depreciation and amortization (56,470)   (56,470)   (53,787)
Property and equipment, net 15,738   15,738   18,404
Depreciation 1,900 $ 3,000 $ 4,000 $ 6,100  
Furniture and fixtures          
Property, Plant and Equipment [Line Items]          
Useful life     5 years    
Property and equipment, gross 2,207   $ 2,207   2,020
Machinery and equipment          
Property, Plant and Equipment [Line Items]          
Property and equipment, gross 35,123   $ 35,123   34,225
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 12,713   $ 12,713   12,645
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 5,658   $ 5,658   5,675
Leasehold improvements          
Property, Plant and Equipment [Line Items]          
Property and equipment, gross 16,208   $ 16,208   17,493
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 $ 299   $ 299   $ 133