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Note 9 - Convertible Note - Key Assumptions of Combined Embedded Derivative (Details) | Sep. 30, 2023 | Apr. 27, 2023
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Measurement Input, Share Price [Member] |  |
Embedded derivative, measurement input | 0.75 | 0.72
Measurement Input, Price Volatility [Member] |  |
Embedded derivative, measurement input | 0.769 | 0.801
Measurement Input, Risk Free Interest Rate [Member] |  |
Embedded derivative, measurement input | 0.0541 | 0.0488
Measurement Input, Expected Dividend Rate [Member] |  |
Embedded derivative, measurement input |  | 0
Measurement Input, Expected Term [Member] |  |
Embedded derivative, measurement input | 0.7 | 0.8

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- Definition Value of input used to measure embedded derivative liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
Name: | us-gaap_EmbeddedDerivativeLiabilityMeasurementInput
Namespace Prefix: | us-gaap_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputSharePriceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputPriceVolatilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputRiskFreeInterestRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputExpectedDividendRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputExpectedTermMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |