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Note 10 - Stockholders' Equity and Common Stock Warrants - Warrants Outstanding to Acquire Shares of Its Common Stock (Details) | Jun. 30, 2024 $ / shares shares
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Warrants outstanding (in shares) | shares | 3,082,891
Historical Diffusion Common Stock Warrants [Member] |
Warrants outstanding (in shares) | shares | 57,965
Historical Diffusion Common Stock Warrants [Member] | Minimum [Member] |
Historical Diffusion common stock warrants (in dollars per share) | $ / shares | $ 26.27
Historical Diffusion Common Stock Warrants [Member] | Maximum [Member] |
Historical Diffusion common stock warrants (in dollars per share) | $ / shares | $ 375.14
Historical EIP Common Stock Warrants [Member] |
Warrants outstanding (in shares) | shares | 43,618
Historical Diffusion common stock warrants (in dollars per share) | $ / shares | $ 19.81
Series A Common Stock Warrants [Member] |
Warrants outstanding (in shares) | shares | 2,532,285
Historical Diffusion common stock warrants (in dollars per share) | $ / shares | $ 39.24
Prefunded Warrant [Member] |
Warrants outstanding (in shares) | shares | 449,023
Historical Diffusion common stock warrants (in dollars per share) | $ / shares | $ 0.001

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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 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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