Note 12 - Stock-based Compensation - Valuation Assumptions (Details) - Share-Based Payment Arrangement, Option [Member] - $ / shares |
3 Months Ended | 6 Months Ended |
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Jun. 30, 2026 |
Jun. 30, 2026 |
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| Estimated weighted-average fair value (in dollars per share) | $ 9.13 | $ 9.98 |
| Expected volatility | 107.00% | 105.00% |
| Expected life, in years (Year) | 7 years 3 months 18 days | 7 years 1 month 6 days |
| Risk-free interest rate | 4.16% | 4.08% |
| Expected dividend yield | 0.00% | 0.00% |
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Rate of weighted-average expected volatility for award under share-based payment arrangement. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Details
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