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Preferred Stock and Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2025

Common Stock Warrants [Member]

Class Of Stock [Line Items]

Schedule of Warrants to Purchase Common Stock Activity

The following table shows the warrants to purchase common stock activity:

		Roll-Forward of Warrant Activity
		Common Stock Warrants				Pre-Funded Warrants				Total
Balance as of December 31, 2024			15,778,451				17,274,293				33,052,744
Issued			—				—				—
Exercised			—				—				—
Cancelled/Expired			—				—				—
Balance as of June 30, 2025			15,778,451				17,274,293				33,052,744

Schedule of Company's Outstanding Warrants to Purchase Shares of Common Stock

The following table summarizes the outstanding warrants as of June 30, 2025:

Date Issued		Number of Shares of Common Stock Issuable				Exercise Price				Expiration Date
January 2020 common warrants			5,586			$	18.90			July 14, 2025
January 2020 common warrants			3,591			$	18.90			July 17, 2025
January 2020 common warrants			247,264			$	12.96			July 14, 2025
January 2020 common warrants			71,800			$	12.96			July 17, 2025
September 2020 common warrants			298,692			$	3.08			September 14, 2025
2023 Securities Purchase Agreement common warrants			15,151,518			$	3.00			May 5, 2028
January 2021 pre-funded warrants			509,117			$	0.001			December 31, 2030
2023 Securities Purchase Agreement pre-funded warrants			3,844,153			$	0.001			N/A
2024 Securities Purchase Agreement pre-funded warrants			7,989,516			$	0.001			N/A
2024 Underwritten Offering pre-funded warrants			4,931,507			$	0.001			N/A
Balance as of June 30, 2025			33,052,744

Preferred Stock Warrants [Member]

Class Of Stock [Line Items]

Schedule of Warrants to Purchase Common Stock Activity

As of June 30, 2025, there were 50,207.419 warrants exercisable into Series X1 Preferred Stock, which are convertible into 2,789,301 shares of common stock (after rounding for fractional shares and subject to beneficial ownership limitations).

		Roll-Forward of Series X1 Non-Voting Convertible Preferred Warrant Activity
		Total
Balance as of December 31, 2024			50,207.419
Issued			—
Exercised			—
Balance as of June 30, 2025			50,207.419

The Series X1 Preferred Stock Warrants were issued on September 14, 2020, with an exercise price of $8.96 and an expiration date of September 14, 2025.

Securities Purchase Agreement [Member]

Class Of Stock [Line Items]

Schedule of Assumptions Used in Black-Scholes Option Pricing Model to Determine Fair Value of Stock Options Granted

The following table presents the assumptions used in the Black-Scholes option pricing model to determine the fair value of the Common Warrants as of June 30, 2025 and December 31, 2024 as follows:

		June 30, 2025				December 31, 2024
Risk-free interest rate		3.7%				4.4%
Expected stock price volatility		86.5%				96.4%
Expected term (in years)		3.0				3.5
Share price		$	2.71			$	4.14

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Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable.

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