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Note 9 - Convertible Notes Payable at Fair Value - Summary of Valuation Assumption (Details)	Dec. 31, 2024	Dec. 31, 2023
Euro Member Countries, Euro
Foreign exchange rate at year end USD/EUR	1.0389	1.105
Measurement Input, Share Price [Member]
Debt Instrument, Measurement Input	4.18	5.92
Measurement Input, Exercise Price [Member]
Debt Instrument, Measurement Input	1.75	1.64
Measurement Input, Price Volatility [Member]
Debt Instrument, Measurement Input	1.50	1.50
Measurement Input, Expected Term [Member]
Debt Instrument, Measurement Input	1	1
Measurement Input, Risk Free Interest Rate [Member]
Debt Instrument, Measurement Input	0.0418	0.042

X

- Definition

Value of input used to measure debt instrument, including, but not limited to, convertible and non-convertible debt.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

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X

- Definition

Foreign exchange rate used to translate amounts denominated in functional currency to reporting currency.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
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-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481674/830-30-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
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