Subsequent Events - Bridge Loan - Additional Information (Details)	May 31, 2022	Mar. 11, 2022 USD ($) Director $ / shares shares	Dec. 31, 2020 $ / shares	Oct. 20, 2020 $ / shares	Oct. 19, 2020 $ / shares	Aug. 08, 2018 USD ($)
Subsequent Event [Line Items]
Warrants, exercise price | $ / shares			$ 0.01	$ 0.01	$ 2.50
Executive Lenders [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Debt borrowed		$ 200,000
Bridge Loan Agreement [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Interest rate		14.00%
Debt instrument maturity, description		a maturity date of the earlier of (i) demand by Antara at any time prior to the date on which a collateral agent designated by Antara has been granted a valid and enforceable, perfected, first priority lien on the collateral described in the Bridge Loan Agreement, subject only to permitted liens, on terms reasonably acceptable to the Antara, and (ii) May 31, 2022.
Maturity date		May 31, 2022
Debt indebtedness amount in event of debt default		$ 100,000
Preferred stock, voting rights		Under the Certificate of Designations, prior to a payment default under the Bridge Loan (a "Bridge Loan Triggering Event") and following the date on which all principal and accrued interest (including default interest) payable under the Bridge Loan has been paid-in-full (the date of such payment-in-full, the "Bridge Loan Discharge Date"), the holder of Series C Preferred will have no voting rights except as otherwise required by law. Under the Certificate of Designations, upon the occurrence of a Bridge Loan Triggering Event through and including the Bridge Loan Discharge Date, the holders of Series C Preferred will vote together with the holders of the Company's common stock as a single class on any matter presented to the holders of the Company's common stock for their action or consideration at any meeting of stockholders of the Company (or by written consent of stockholders in lieu of meeting) or on which such holders of common stock are otherwise entitled to act (each, a "Shareholder Matter"), and the holders of Series C Preferred will be entitled to cast a number of votes on any Shareholder Matter equal to the total number of votes of all non-holders of Series C Preferred entitled to vote on any such Shareholder Matter plus 10. In addition, the Certificate of Designations provides that governance mechanisms that could have the effect of limiting, reducing or adversely affecting the Series C Preferred holders’ voting or board-appointment rights under the Certificate of Designations will require the consent of holders of a majority of the then outstanding (the "Series C Majority") Series C Preferred.
Bridge loan triggering event number of director to be elected or appointed to board | Director		1
Bridge Loan Agreement [Member] | Series C Preferred Stock [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Preferred stock, shares authorized | shares		1
Bridge Loan Agreement [Member] | Antara [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Debt borrowed		$ 9,000,000
Maximum additional debt amount borrowed		$ 3,000,000
Warrants to purchase shares of common stock | shares		11,969,667
Warrants, exercise price | $ / shares		$ 0.01
Bridge Loan Agreement [Member] | Executive Lenders [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Warrants to purchase shares of common stock | shares		1,097,219
Warrants, exercise price | $ / shares		$ 0.01
Executive Loans [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Interest rate		14.00%
Executive Loans [Member] | Executive Lenders [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Debt borrowed		$ 825,000
Secured Convertible Note [Member]
Subsequent Event [Line Items]
Principal amount						$ 200,000
Bridge Loan Warrant [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Debt instrument term		5 years
Bridge Loan Extension Agreement [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Maturity date	Jun. 30, 2022