Subsequent Events - Purchase and Cancellation of Secured Convertible Promissory Notes - Additional Information (Details) - Note Purchase Agreements and Releases [Member] - 2018 Convertible Notes [Member] - Forecast [Member]	Apr. 30, 2021 USD ($) $ / shares shares
Subsequent Event [Line Items]
Principal amount	$ 555,000
Notes payable in cash	$ 92,000
Warrants to purchase shares of common stock | shares	231,453
Warrants, exercise price | $ / shares	$ 0.01