Commitments and Contingencies - Additional Information (Details)							1 Months Ended		3 Months Ended
	Mar. 19, 2021 USD ($)	Jan. 25, 2021 USD ($)	Jan. 21, 2021 USD ($)	Jun. 05, 2020	Apr. 11, 2020 USD ($)	Sep. 27, 2017 USD ($)	Sep. 30, 2018 Patent	Aug. 31, 2016	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Commitments And Contingencies [Line Items]
Reimbursement payment	$ 14,000,000
Minimum percentage of loan proceeds used to cover payroll costs eligible for loan forgiven				60.00%	75.00%
Prepaid expenses and other current assets									$ 10,507,161	$ 679,461
Pending Litigation | Piper Sandler & Co.
Commitments And Contingencies [Line Items]
Loss contingency payable fees						$ 1,100,000
Loss contingency closing date						Sep. 19, 2017
Financing aggregate consideration						$ 15,700,000
Reimbursement expenses						$ 100,000
Pending Litigation | The Securities Class Action
Commitments And Contingencies [Line Items]
Proposed settlement as a loss in accrued expenses									$ 8,400,000
Pending Litigation | Stockholders Derivative Action
Commitments And Contingencies [Line Items]
Payment of settlement plus legal fees and costs in excess of retention (deductible) amount			$ 500,000
Prepaid expenses and other current assets			$ 1,500,000
PPP Loan
Commitments And Contingencies [Line Items]
Debt instrument, description									On June 5, 2020, the Payroll Protection Flexibility Act of 2020 was signed into law, adjusting certain terms of the loans issued under the PPP, including extending the initial deferral period from six to up to ten months, reducing from 75% to 60% the portion of loan proceeds required to be used to cover payroll costs, and allowing borrowers to elect a 24-week rather than an eight-week period related to employment and compensation provisions.
PPP Loan | Other Current Liabilities
Commitments And Contingencies [Line Items]
CARES act of 2020 aid loan amount					$ 500,000
PPP Loan | Other Non-current Liabilities
Commitments And Contingencies [Line Items]
CARES act of 2020 aid loan amount					38,000
PPP Loan | JPMorgan Chase Bank, N.A
Commitments And Contingencies [Line Items]
CARES act of 2020 aid loan amount					$ 600,000
Promissory Note | JPMorgan Chase Bank, N.A
Commitments And Contingencies [Line Items]
Debt instrument, term					2 years
Debt instrument, interest rate					1.00%
Assistance Publique - Hopitaux de Paris ("AP-HP") | License Agreement
Commitments And Contingencies [Line Items]
Agreement entered date							2018-09
Number of patent applications | Patent							3
Assistance Publique - Hopitaux de Paris ("AP-HP") | Private Acer | License Agreement
Commitments And Contingencies [Line Items]
Agreement entered date								2016-08
Relief | Collaboration Agreement
Commitments And Contingencies [Line Items]
Upfront non-refundable payment received		$ 1,000,000
Cash payment received	10,000,000	10,000,000
Reimbursement payment	14,000,000	14,000,000
Repayment of outstanding balance of prior loan and interest	4,000,000	4,000,000
Development and commercial launch costs	$ 20,000,000
Development payments subject new drug application		$ 10,000,000							$ 10,000,000
Net profit split ratio based on territory	60.00%	60.00%
Percentage of royalty revenue received	15.00%	15.00%
Milestone payment to be received	$ 6,000,000	$ 6,000,000
Promissory note cancellation amount		4,000,000
Relief | Collaboration Agreement | Maximum
Commitments And Contingencies [Line Items]
Development and commercial launch costs		$ 20,000,000
Relief | Collaboration Agreement | Secured Loan
Commitments And Contingencies [Line Items]
Debt instrument, term		12 months
Debt instrument, principal amount		$ 4,000,000
Debt instrument, interest rate		6.00%