Long-term Debt and Warrant Liability - Additional Information (Details) - USD ($)		3 Months Ended	9 Months Ended
	Jun. 05, 2020	Sep. 30, 2020	Sep. 30, 2020	Jun. 30, 2020
Long Term Debt And Warrant Liability [Line Items]
Exercise price per share		$ 1.05	$ 1.05
Change in fair value of warrant liability		$ 3,141,000	$ 3,141,000
Series B Preferred Stock
Long Term Debt And Warrant Liability [Line Items]
Warrant issued to purchase shares				2,857,142
Term Loan | Series B Preferred Stock
Long Term Debt And Warrant Liability [Line Items]
Exercise price per share		$ 1.05	$ 1.05
Change in fair value of warrant liability			$ 5,500,000
Term Loan | Maximum | Series B Preferred Stock
Long Term Debt And Warrant Liability [Line Items]
Warrant issued to purchase shares		2,857,142	2,857,142
Credit Agreement with Perceptive Life Sciences Master Fund LTD | Term Loan
Long Term Debt And Warrant Liability [Line Items]
Interest at variable rate	11.25%
Description of Variable Rate Basis			one-month LIBOR rate, which, per the Credit Agreement, can never be below 1.75%
Applicable margin rate	9.50%
Maturity date	Sep. 05, 2024
Date until which interest only payments are made	Dec. 05, 2022
Percentage of principal payments until maturity	2.00%
Prepayment fee	$ 5,000,000
Prepayment minimum principal amount	500,000
Prepayment principal amount multiples	100,000
Closing fee in connection with entry into Credit Agreement	300,000
Aggregate principal amount of debt outstanding		$ 12,500,000	$ 12,500,000
Unamortized debt discount		2,600,000	2,600,000
Carrying value of long-term debt, net of issuance costs and debt discount related to warrants to purchase shares of equity securities that were issued in connection with entry into Credit Agreement		$ 9,700,000	$ 9,700,000
Credit Agreement with Perceptive Life Sciences Master Fund LTD | Term Loan | Maximum
Long Term Debt And Warrant Liability [Line Items]
Aggregate principal amount	20,000,000
Credit Agreement with Perceptive Life Sciences Master Fund LTD | Term Loan | Minimum
Long Term Debt And Warrant Liability [Line Items]
Balance to be maintained in bank account while debt is outstanding	3,000,000
Credit Agreement with Perceptive Life Sciences Master Fund LTD | Term Loan | Tranche One
Long Term Debt And Warrant Liability [Line Items]
Aggregate principal amount	12,500,000
Amount withdrawn				$ 12,500,000
Credit Agreement with Perceptive Life Sciences Master Fund LTD | Term Loan | Tranche Two
Long Term Debt And Warrant Liability [Line Items]
Aggregate principal amount	$ 7,500,000