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Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Accounting Policies [Abstract]        
Net loss attributable to noncontrolling interests $ (0.9) $ (1.5) $ (0.2) $ (6.9)
Deferred offering costs $ 2.7   $ 2.7