Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Equipment and Revenue Recognition (Details)

v3.20.4
Summary of Significant Accounting Policies - Equipment and Revenue Recognition (Details)
$ in Millions
12 Months Ended
Dec. 31, 2020
USD ($)
segment
Dec. 31, 2019
USD ($)
Equipment and leasehold improvements    
Payment period 3 years  
Number of reportable operating segments | segment 2  
Equipment | Minimum    
Equipment and leasehold improvements    
Useful lives of assets 3 years  
Equipment | Maximum    
Equipment and leasehold improvements    
Useful lives of assets 5 years  
Capitalized software    
Equipment and leasehold improvements    
Software development costs, gross | $ $ 0.8 $ 0.0
Capitalized software | Minimum    
Equipment and leasehold improvements    
Amortization period 4 years  
Capitalized software | Maximum    
Equipment and leasehold improvements    
Amortization period 10 years