Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Narrative (Details)

v3.21.2
Summary of Significant Accounting Policies - Narrative (Details)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2021
USD ($)
segment
Sep. 30, 2020
USD ($)
Accounting Policies [Abstract]        
Number of operating segments | segment     1  
Number of reportable segments | segment     1  
Impairment charges, long-lived assets | $ $ 0.7 $ 9.9 $ 2.5 $ 16.9
Deferred offering costs | $ $ 2.2   $ 2.2