XML 50 R40.htm IDEA: XBRL DOCUMENT
v3.26.1

Equity Incentive Plan (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2026
Equity Incentive Plan |
Summary of the Company's stock option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Weighted Average | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Grant Date | ​ | Weighted Average
​ | ​ ​ ​ | Shares | ​ ​ ​ | Fair Value | ​ ​ ​ | Exercise Price
Options outstanding as of December 31, 2025 |  | ​ | 3,531,980 | ​ | $ | 2.35 | ​ | $ | 3.64
Options granted |  | ​ | 798,500 |  | ​ | 1.38 | ​ | ​ | 1.86
Options canceled/forfeited |  | ​ | (325,324) |  | ​ | 1.97 | ​ | ​ | 3.53
Options outstanding as of March 31, 2026 | ​ | ​ | 4,005,156 | ​ | $ | 2.18 | ​ | $ | 3.29
Schedule of assumptions to determine grant-date fair value of stock options granted during the period | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Three Months Ended March 31
​ | 2026 | ​ ​ ​ | 2025
Grant date fair value | $ | 1.38 | ​ | ​ | $ | 1.67 | ​
Volatility | ​ | 85 | % | ​ | ​ | 80 | %
Expected term (years) | ​ | 6.08 | ​ | ​ | ​ | 6.08 | ​
Risk-free interest rate | ​ | 4.04 | % | ​ | ​ | 4.09 | %
Expected dividend yield | ​ | — | ​ | ​ | ​ | — | ​
Schedule of unvested restricted stock units | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted Average
​ | ​ | ​ | ​ | Grant Date Fair
​ | Numbers of Shares | ​ | Value per Share
Outstanding as of December 31, 2025 |  | 20,303 | ​ | $ | 4.19
Vested | ​ | (399) | ​ | ​ | 3.58
Canceled/forfeited | ​ | (116) | ​ | ​ | 3.58
Outstanding as of March 31, 2026 | ​ | 19,788 | ​ | $ | 4.20
Total unrecognized expense remaining | $ | 63,970 | ​ | ​ | ​
Years unrecognized expense expected to be recognized over | ​ | 1.0 | ​ | ​ | ​
Schedule of stock-based compensation expense recognized for stock options granted to employees and non-employees | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended March 31
​ | ​ ​ ​ | 2026 | ​ ​ ​ | 2025
Research and development |  | $ | 258,533 |  | $ | 267,968
General and administrative |  | ​ | 144,976 |  | ​ | 151,536
Total stock-based compensation |  | $ | 403,509 |  | $ | 419,504
​

X
- References No definition available. + Details
Name: | us-gaap_CompensationRelatedCostsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (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://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
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the change in restricted stock units (RSUs). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ScheduleOfUnvestedRestrictedStockUnitsRollForwardTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration