Note 9 - Income Taxes - Net Deferred Tax Assets (Details) - USD ($) |
Sep. 30, 2023 |
Sep. 30, 2022 |
|---|---|---|
| Net operating loss carryforwards | $ 12,905,738 | $ 11,485,524 |
| Capitalized expenditures | 1,396,415 | 1,535,736 |
| Research and development credit carryforwards | 1,014,466 | 946,246 |
| Stock based compensation | 1,491,338 | 1,427,946 |
| Property and Equipment | 1,531 | 2,616 |
| Accrued expenses | 746,143 | 162,191 |
| Inventory allowance | 51,463 | 70,805 |
| Gross deferred tax assets | 17,607,094 | 15,631,061 |
| Deferred tax asset valuation allowance | 17,607,094 | 15,631,061 |
| Net deferred tax assets | $ 0 | $ 0 |
| X | ||||||||||
- Definition Deferred tax assets capitalized expenditures. No definition available.
|
| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from inventory. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from property, plant, and equipment. No definition available.
|
| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible research tax credit carryforwards. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from accrued liabilities. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|