Commitments and Contingencies - Additional Information (Details) - USD ($)		1 Months Ended
	Aug. 01, 2018	Oct. 31, 2017	Dec. 31, 2019
Loss Contingencies [Line Items]
Contingent liabilities relating to potential future milestone payments			$ 0
DSM Collaborative Arrangement
Loss Contingencies [Line Items]
Contingent payments due (up to)	$ 75,000,000
Envisia Therapeutics Inc.
Loss Contingencies [Line Items]
Milestone period		15 years