XML 41 R34.htm IDEA: XBRL DOCUMENT
v3.25.2

Stock-Based Compensation and Employee Stock Purchase Program (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2025
Share-Based Payment Arrangement [Abstract] |
Summary of Activity Under Stock Incentive Plans | The following is a summary of stock option information and weighted average exercise prices under the Company’s stock incentive plans:
|  | Shares Subject to Outstanding Options |  |  | Weighted- Average Exercise Price Per Share |  |  | Aggregate Intrinsic Value |
Outstanding — Balance at December 31, 2024 |  |  | 205,475 |  |  | $ | 21.00 |  |  | $ | 516,378 |
Options granted |  |  | 25,000 |  |  |  | 3.88 |  |  |  | — |
Options expired |  |  | (16,525 | ) |  | $ | 92.85 |  |  |  | — |
Outstanding — Balance at June 30, 2025 |  |  | 213,950 |  |  | $ | 13.05 |  |  | $ | 261,550 |
Vested and expected to vest — June 30, 2025 |  |  | 201,153 |  |  |  |  |  |  |
Exercisable — June 30, 2025 |  |  | 27,818 |  |  |  |  |  | $ | — |
Weighted-Average Fair Value Assumption of Stock Option Awards | The fair value of stock option awards was estimated at the date of grant using the Black-Scholes option-pricing model with the following weighted-average assumption:
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Expected term (years) |  |  | 6.07 |  |  |  | — |  |  |  | 6.07 |  |  |  | — |
Expected volatility |  |  | 104 | % |  |  | — |  |  |  | 104 | % |  |  | — |
Risk-free interest rate |  |  | 4.10 | % |  |  | — |  |  |  | 4.10 | % |  |  | — |
Dividend yield |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |

X
- References No definition available. + Details
Name: | us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
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