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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
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

X

- 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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X

- Definition

Number of warrants or rights outstanding.

+ References

No definition available.

+ Details

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