Equity Incentive Plans and Warrants (Tables)

9 Months Ended

Sep. 30, 2025

Equity Incentive Plans and Warrants [Abstract]

Valuation Assumptions

Options granted under the 2021 Stock Option Plan for the nine months ended September 30, 2025 to employees and nonemployees were 1,529,515 and 70,400, respectively and the weighted average exercise prices were $1.09 and $0.98, respectively. The weighted average fair values of the options granted to employees and nonemployees were $0.84 and $0.73, respectively and were estimated using the following Black-Scholes assumptions:

	Employees		Nonemployees
Expected term (in years)	6.06		5.50
Risk‑free interest rate	4.37	%	3.91	%
Dividend yield	—	%	—	%
Expected volatility	91.16	%	90.77	%

Share-based Compensation Expense

The following table shows the share-based compensation expense related to vested stock option grants to employees and nonemployees by financial statement line item on the accompanying condensed statements of comprehensive loss:

	Three Months Ended September 30,			Nine Months Ended September 30,
		2025	2024		2025	2024
Research and development	$	65,625	49,800		270,847	114,437
Sales and marketing		19,047	18,895		30,034	43,659
General and administrative		89,842	59,711		422,841	151,908
Total share-based compensation expense	$	174,514	128,406		723,722	310,004

2021 Stock Option Plan [Member]

Equity Incentive Plans and Warrants [Abstract]

Stock Option Plans Activity

Activity under the Company’s stock option plans for the nine months ended September 30, 2025 was as follows:

	Number of options			Weighted average exercise price		Aggregate Intrinsic Value
Outstanding at December 31, 2024	2,974,219		$	1.60
Granted	1,599,915			1.08
Forfeited	(242,608	)		1.10
Outstanding at September 30, 2025	4,331,526		$	1.44	$	—
Vested and exercisable at September 30, 2025	2,000,667		$	1.89	$	—

Inducement Grants [Member]

Equity Incentive Plans and Warrants [Abstract]

Stock Option Plans Activity

The inducement grants are summarized as follows:

	Number of options			Weighted average exercise price	Weighted average remaining life years
Outstanding at December 31, 2024	250,000		$	1.89	8.07
Granted	100,000			0.90	9.73
Forfeited	(100,000	)		1.10	—
Outstanding at September 30, 2025	250,000		$	1.81	7.86
Vested and exercisable at September 30, 2025	100,000		$	2.56	6.57