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Summary of Significant Accounting Policies - Property and equipment (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Accounting Policies [Abstract]    
Depreciation and amortization expense (excluding intangibles amortization) $ 10,600,000 $ 6,500,000
Leasehold improvements | Minimum    
Property, Plant and Equipment [Line Items]    
Useful life 2 years  
Leasehold improvements | Maximum    
Property, Plant and Equipment [Line Items]    
Useful life 5 years  
Charging stations and digital media screens | Minimum    
Property, Plant and Equipment [Line Items]    
Useful life 5 years  
Charging stations and digital media screens | Maximum    
Property, Plant and Equipment [Line Items]    
Useful life 10 years  
Capitalized research and development equipment | Minimum    
Property, Plant and Equipment [Line Items]    
Useful life 2 years  
Capitalized research and development equipment | Maximum    
Property, Plant and Equipment [Line Items]    
Useful life 5 years  
Computers and equipment | Minimum    
Property, Plant and Equipment [Line Items]    
Useful life 3 years  
Computers and equipment | Maximum    
Property, Plant and Equipment [Line Items]    
Useful life 5 years  
Furniture    
Property, Plant and Equipment [Line Items]    
Useful life 5 years  
Leasehold improvements | Minimum    
Property, Plant and Equipment [Line Items]    
Useful life 2 years  
Leasehold improvements | Maximum    
Property, Plant and Equipment [Line Items]    
Useful life 5 years  
Capitalized software    
Property, Plant and Equipment [Line Items]    
Useful life 3 years  
Construction in Progress    
Property, Plant and Equipment [Line Items]    
Other operating expense $ 1,900,000 $ 16,100