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Stock-Based Awards - Additional Information (Details) - USD ($) $ in Millions	1 Months Ended		9 Months Ended
	Aug. 31, 2019	Jan. 31, 2017	Sep. 30, 2020	Oct. 31, 2020
Restricted Stock Purchase Agreement \| Executive Officer and Director
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Purchase of restricted stock		3,624,355
Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unamortized stock-based compensation expense related to stock option			$ 107.9
Estimated weighted average period			2 years 8 months 12 days
Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Estimated weighted average period			7 months 6 days
Repayment of outstanding promissory notes and accrued interest received	$ 3.3
Unrecognized compensation cost related to unvested restricted stock			$ 0.2
Restricted Stock \| Subsequent Event
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock liability recognized for portion of promissory note repayment				$ 0.1