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 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Property, Plant and Equipment [Line Items]          
Property and equipment, gross $ 73,216   $ 73,216   $ 72,191
Less accumulated depreciation and amortization (58,012)   (58,012)   (53,787)
Property and equipment, net 15,204   15,204   18,404
Depreciation 1,700 $ 2,800 $ 5,600 $ 8,900  
Furniture and fixtures          
Property, Plant and Equipment [Line Items]          
Useful life     5 years    
Property and equipment, gross 2,199   $ 2,199   2,020
Machinery and equipment          
Property, Plant and Equipment [Line Items]          
Property and equipment, gross 35,600   $ 35,600   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 12,700   $ 12,700   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 5,701   $ 5,701   5,675
Leasehold improvements          
Property, Plant and Equipment [Line Items]          
Property and equipment, gross 16,133   $ 16,133   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 $ 883   $ 883   $ 133