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Financial Statement Components - Property and Equipment Capitalized Under Capital Lease Obligations (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Line Items]    
Total property and equipment capitalized under capital lease obligations $ 926 $ 579
Less: accumulated depreciation and amortization (219) (71)
Total 707 508
Computer hardware and software    
Property, Plant and Equipment [Line Items]    
Total property and equipment capitalized under capital lease obligations 88 88
Machinery and equipment    
Property, Plant and Equipment [Line Items]    
Total property and equipment capitalized under capital lease obligations $ 838 $ 491