Note 7 - Equity - Stock Option Activity (Details) - $ / shares |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Outstanding, number of options (in shares) | 804,000 | 977,000 | 977,000 | |
| Outstanding, weighted average exercise price (in dollars per share) | $ 3.88 | $ 3.74 | $ 3.74 | |
| Outstanding, weighted average remaining life (Year) | 2 years 9 months 18 days | 3 years | 3 years 6 months | |
| Issued, number of options (in shares) | 6,000 | 8,000 | ||
| Issued, weighted average exercise price (in dollars per share) | $ 15.21 | $ 18.73 | ||
| Exercised, number of options (in shares) | 0 | (173) | (181,000) | |
| Exercised, weighted average exercise price (in dollars per share) | $ 0 | $ 3.78 | ||
| Forfeited, number of options (in shares) | 0 | 0 | ||
| Forfeited, weighted average exercise price (in dollars per share) | $ 0 | $ 0 | ||
| Outstanding, number of options (in shares) | 810,000 | 804,000 | 977,000 | |
| Outstanding, weighted average exercise price (in dollars per share) | $ 3.97 | $ 3.88 | $ 3.74 | |
| X | ||||||||||
- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Gross number of share options (or share units) granted during the period. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Weighted average price at which option holders acquired shares when converting their stock options into shares. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Weighted-average contractual term remaining for option award outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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