Commitments and Contingencies - Additional Information (Details) $ in Millions		1 Months Ended	12 Months Ended
	Sep. 27, 2017 USD ($)	Sep. 30, 2018 Patent	Dec. 31, 2019
Pending Litigation | Piper Sandler & Co.
Commitments And Contingencies [Line Items]
Loss contingency payable fees	$ 1.1
Loss contingency closing date	Sep. 19, 2017
Financing aggregate consideration	$ 15.7
Reimbursement expenses	$ 0.1
Assistance Publique – Hôpitaux de Paris (“AP-HP”) | License Agreement
Commitments And Contingencies [Line Items]
Agreement entered date		2018-09
Number of patent applications | Patent		3
Assistance Publique – Hôpitaux de Paris (“AP-HP”) | Private Acer | License Agreement
Commitments And Contingencies [Line Items]
Agreement entered date			2016-08