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Note 10 - Share-based Compensation - Schedule of Allocated Expense 2 (Details) - USD ($) | 3 Months Ended | 6 Months Ended
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Mar. 31, 2026 | Mar. 31, 2025 | Mar. 31, 2026 | Mar. 31, 2025
Share-based compensation expense | $ 402,712 | $ 2,223,843 | $ 1,160,317 | $ 4,897,948
Location, Statement of Income, Balance [Axis]: us-gaap:GeneralAndAdministrativeExpense |  |  |  |
Share-based compensation expense | 311,852 | 1,618,958 | 905,058 | 3,623,674
Location, Statement of Income, Balance [Axis]: us-gaap:ResearchAndDevelopmentExpense |  |  |  |
Share-based compensation expense | $ 90,860 | $ 604,885 | $ 255,259 | $ 1,284,323

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section S45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479983/718-10-S45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479830/718-10-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Details
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