Note 5 - Capital Shares - Option Activity (Details) - $ / shares |
9 Months Ended | |||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2024 |
|
| Balance, number of options (in shares) | 378,235 | 378,039 | 378,039 | 383,040 |
| Balance, options, weighted average exercise price (in dollars per share) | $ 24.66 | $ 24.7 | $ 24.7 | $ 24.93 |
| Balance, options, weighted average grant date fair value (in dollars per share) | $ 18.1 | $ 18.12 | $ 18.12 | $ 18.33 |
| Forfeited, number of options (in shares) | (4,431) | |||
| Forfeited, options, weighted average exercise price (in dollars per share) | $ 25.2 | |||
| Forfeited, options, weighted average grant date fair value (in dollars per share) | $ 17.69 | |||
| Expired (in shares) | (374) | |||
| Expired, options, weighted average exercise price (in dollars per share) | $ 246.96 | |||
| Expired, options, weighted average grant date fair value (in dollars per share) | $ 246.96 |
| X | ||||||||||
- Definition Weighted average grant-date fair value of options outstanding. No definition available.
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| X | ||||||||||
- Definition Weighted average grant-date fair value of options expired. No definition available.
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| X | ||||||||||
- Definition Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| 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 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 grantees could have acquired the underlying shares with respect to stock options of the plan that expired. 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 grant-date fair value of non-vested options forfeited. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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