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v3.25.2

Equity Incentive Plans and Warrants (Tables) | 6 Months Ended
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Jun. 30, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Valuation Assumptions | Options granted under the 2021 Stock Option Plan for the six months ended June 30, 2025 to employees and nonemployees were 1,524,915 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 |  |  | 91.17 | % |  |  | 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 June 30, |  | Six Months Ended June 30,
|  | 2025 |  |  |  | 2024 |  |  |  | 2025 |  |  |  | 2024 |
Research and development | $ | 68,299 |  |  |  | 34,629 |  |  |  | 205,223 |  |  |  | 64,637 |
Sales and marketing |  | 21,418 |  |  |  | 18,246 |  |  |  | 10,987 |  |  |  | 24,764 |
General and administrative |  | 92,254 |  |  |  | 51,138 |  |  |  | 332,998 |  |  |  | 92,197 |
Total share-based compensation expense | $ | 181,971 |  |  |  | 104,013 |  |  |  | 549,208 |  |  |  | 181,598 |
2021 Stock Option Plan [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Stock Option Plans Activity | Activity under the Company’s stock option plans for the six months ended June 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 |  |  | 1,595,315 |  |  |  | 1.09 |  |  |  |  |
Forfeited |  |  | (171,037 | ) |  |  | 1.10 |  |  |  |  |
Outstanding at June 30, 2025 |  |  | 4,398,497 |  |  | $ | 1.43 |  |  |  | 619,562 |
Vested and exercisable at June 30, 2025 |  |  | 1,796,098 |  |  | $ | 2.01 |  |  |  | 380,874 |
Inducement Grants [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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 |  |  |  | 9.98 |
Forfeited |  | (100,000 | ) |  |  | 1.10 |  |  |  | — |
Outstanding at June 30, 2025 |  | 250,000 |  |  | $ | 1.81 |  |  |  | 8.11 |
Vested and exercisable at June 30, 2025 |  | 100,000 |  |  | $ | 2.56 |  |  |  | 6.82 |

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans, including, but not limited to: (a) expected term, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -SubTopic 50 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/718-50/tableOfContent Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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