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Note 5 - Warrant Liabilities - Warrant Valuation Assumptions (Details) | Jun. 30, 2025 | Dec. 31, 2024
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Notes Warrants [Member] | Measurement Input, Share Price [Member] |  |
Warrants and Rights Outstanding, Measurement Input | 0.86 | 1.31
Notes Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member] |  |
Warrants and Rights Outstanding, Measurement Input | 0.039 | 0.042
Notes Warrants [Member] | Measurement Input, Expected Dividend Rate [Member] |  |
Warrants and Rights Outstanding, Measurement Input | 0 | 0
Notes Warrants [Member] | Measurement Input, Expected Term [Member] |  |
Warrants and Rights Outstanding, Measurement Input | 2.12 | 2.61
Notes Warrants [Member] | Measurement Input, Price Volatility [Member] |  |
Warrants and Rights Outstanding, Measurement Input | 1.173 | 1.059
Additional Warrants [Member] | Measurement Input, Share Price [Member] |  |
Warrants and Rights Outstanding, Measurement Input | 0.86 | 1.31
Additional Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member] |  |
Warrants and Rights Outstanding, Measurement Input | 0.039 | 0.043
Additional Warrants [Member] | Measurement Input, Expected Dividend Rate [Member] |  |
Warrants and Rights Outstanding, Measurement Input | 0 | 0
Additional Warrants [Member] | Measurement Input, Expected Term [Member] |  |
Warrants and Rights Outstanding, Measurement Input | 2.62 | 3.12
Additional Warrants [Member] | Measurement Input, Price Volatility [Member] |  |
Warrants and Rights Outstanding, Measurement Input | 1.127 | 0.996

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- Definition Value of input used to measure outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur. + 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)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: 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 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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