v3.21.1
Summary of Significant Accounting Policies - Property and Equipment (Details)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Buildings    
Property, Plant and Equipment [Line Items]    
Property and Equipment Useful Lives (in years) 15 years  
Leasehold improvements    
Property, Plant and Equipment [Line Items]    
Property and Equipment Useful Lives (in years) 5 years 5 years
Minimum | Vehicles    
Property, Plant and Equipment [Line Items]    
Property and Equipment Useful Lives (in years) 5 years  
Minimum | Equipment    
Property, Plant and Equipment [Line Items]    
Property and Equipment Useful Lives (in years) 5 years  
Minimum | Office equipment    
Property, Plant and Equipment [Line Items]    
Property and Equipment Useful Lives (in years) 5 years  
Maximum | Vehicles    
Property, Plant and Equipment [Line Items]    
Property and Equipment Useful Lives (in years) 10 years  
Maximum | Equipment    
Property, Plant and Equipment [Line Items]    
Property and Equipment Useful Lives (in years) 7 years  
Maximum | Office equipment    
Property, Plant and Equipment [Line Items]    
Property and Equipment Useful Lives (in years) 7 years