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Summary of Significant Accounting Policies - Narrative (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 6 Months Ended
Mar. 31, 2020
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Accounting Policies [Abstract]          
Severance costs $ 0.7        
Advertising expense   $ 0.1 $ 0.1 $ 0.2 $ 0.1
Deferred offering costs   $ 2.1   $ 2.1