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Note 9 - Stockholders' Equity and Common Stock Warrants - Warrants Outstanding to Acquire Shares of Its Common Stock (Details) | Sep. 30, 2025 $ / shares shares
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Warrants outstanding (in shares) | shares | 2,601,671
Minimum [Member] |
Warrants and Rights Outstanding, Maturity Date | May 01, 2025
Historical EIP common stock warrants | May 01, 2025
Maximum [Member] |
Warrants and Rights Outstanding, Maturity Date | Feb. 28, 2026
Historical EIP common stock warrants | Feb. 28, 2026
Historical Diffusion Common Stock Warrants [Member] |
Warrants outstanding (in shares) | shares | 25,768
Historical Diffusion Common Stock Warrants [Member] | Minimum [Member] |
Warrants, exercise price (in dollars per share) | $ / shares | $ 44.55
Historical Diffusion Common Stock Warrants [Member] | Maximum [Member] |
Warrants, exercise price (in dollars per share) | $ / shares | $ 96.12
Historical EIP Common Stock Warrants [Member] |
Warrants outstanding (in shares) | shares | 43,618
Warrants, exercise price (in dollars per share) | $ / shares | $ 19.81
Warrants and Rights Outstanding, Maturity Date | Apr. 30, 2028
Historical EIP common stock warrants | Apr. 30, 2028
Series A Common Stock Warrants [Member] |
Warrants outstanding (in shares) | shares | 2,532,285
Warrants, exercise price (in dollars per share) | $ / shares | $ 39.24
Warrants and Rights Outstanding, Maturity Date | Apr. 30, 2027
Historical EIP common stock warrants | Apr. 30, 2027

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- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)(4)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-3 + Details
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- Definition Number of warrants or rights outstanding. + References No definition available. + Details
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- Definition Expiration date of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in YYYY-MM-DD format. + 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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