Current report filing

Basis of Presentation and Summary of Significant Accounting Policies (Details)

v3.20.4
Basis of Presentation and Summary of Significant Accounting Policies (Details)
$ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2020
USD ($)
item
Dec. 31, 2019
USD ($)
item
Significant Accounting Policies [Line Items]    
Money market funds $ 33.9 $ 40.5
Other highly liquid cash equivalents 0.0 25.0
Deferred revenue 1.1 2.2
Deferred cost of sales 0.0 0.3
Allowance for doubtful accounts 0.5 0.2
Bad debt expense $ 0.3 $ 0.0
Number of customers represents more than 10% of total accounts receivable | item 1 0
Transaction costs payable $ 2.3  
Accounts Payable    
Significant Accounting Policies [Line Items]    
Transaction costs payable 1.7  
Accrued expenses and other current liabilities    
Significant Accounting Policies [Line Items]    
Transaction costs payable $ 0.6