Commitments and Contingencies - Additional Information (Details)		1 Months Ended	3 Months Ended
	Sep. 27, 2017 USD ($)	Sep. 30, 2018 Patent	Mar. 31, 2019
Private Acer | Pending Litigation | Piper Jaffray & Co.
Commitments And Contingencies [Line Items]
Loss contingency payable fees	$ 1,097,207
Loss contingency closing date	Sep. 19, 2017
Financing aggregate consideration	$ 15,700,000
Reimbursement expenses	$ 67,496
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