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Note 2 - Summary of Significant Accounting Policies (Details Textual)		3 Months Ended		9 Months Ended		11 Months Ended
	Jul. 11, 2024 USD ($) $ / shares	Sep. 30, 2024 USD ($) $ / shares shares	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) $ / shares shares	Sep. 30, 2023 USD ($)	Aug. 31, 2024 USD ($)	Apr. 09, 2024 USD ($)	Dec. 31, 2023 USD ($) $ / shares	Oct. 31, 2023 USD ($)
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares		$ 0.0001		$ 0.0001				$ 0.0001
Inventory, Raw Materials, Gross		$ 114,000		$ 114,000				$ 23,000
Inventory, Finished Goods, Gross		14,000		14,000				$ 14,000
Research and Development Expense		4,471,000	$ 5,972,000	14,490,000	$ 19,982,000
Grant Funding on Conditional Grants [Member]
Research and Development Expense		1,300,000	$ 200,000	3,300,000	$ 300,000
NIH Grant Total [Member]
Government Assistance, Award Amount									$ 45,100,000
Subawards [Member]
Government Assistance, Award Amount							$ 7,300,000
Government Assistance, Cash Receipt						$ 4,700,000
Accrued Expense Reimbursement		$ 700,000		$ 700,000
Reverse Recapitalization [Member] | Clene Nanomedicine Contingent Earn-out [Member]
Business Combination, Contingent Earnout Shares, Milestone One (in shares) | shares		166,928		166,928
Business Combination, Contingent Earnout, Milestone One, Minimum Price (in dollars per share) | $ / shares		$ 300		$ 300
Business Combination, Contingent Earnout, Milestone One, Consecutive Trading Days (Day)				20 days
Business Combination, Contingent Earnout, Milestone One, Trading Day Period (Day)				30 days
Business Combination, Contingent Earnout, Milestone One, Period (Year)				3 years
Business Combination, Contingent Earnout Shares, Milestone Two (in shares) | shares		125,200		125,200
Business Combination, Contingent Earnout, Milestone Two, Minimum Price (in dollars per share) | $ / shares		$ 400		$ 400
Business Combination, Contingent Earnout, Milestone Two, Consecutive Trading Days (Day)				20 days
Business Combination, Contingent Earnout, Milestone Two, Trading Day Period (Day)				30 days
Business Combination, Contingent Earnout, Milestone Two, Period (Year)				5 years
Business Combination, Contingent Earnout, Milestone Two, Change of Control Period (Year)				5 years
Reverse Recapitalization [Member] | Initial Stockholders Contingent Earn-out [Member]
Business Combination, Contingent Earnout Shares, Milestone One (in shares) | shares		18,750		18,750
Business Combination, Contingent Earnout Shares, Milestone Two (in shares) | shares		18,750		18,750
Maximum [Member] | Subawards [Member]
Government Assistance, Award Amount									$ 30,900,000
Equipment [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)		3 years		3 years
Equipment [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)		5 years		5 years
Furniture and Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)		3 years		3 years
Furniture and Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)		7 years		7 years
Computer Equipment [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)		2 years		2 years
Computer Equipment [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)		5 years		5 years
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	20
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares	$ 0.0001
Adjustments to Additional Paid in Capital, Stock Split	$ 12,000

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