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Note 16 - Subsequent Events (Details Textual) - Subsequent Event [Member] - USD ($) $ in Millions | 7 Months Ended |
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May 08, 2024 | Apr. 09, 2024
NIH Grant Awarded to Clene, Columbia University, and Synapticure [Member] |  |
Government Assistance, Award Amount |  | $ 45.1
NIH Grant Subawards [Member] |  |
Government Assistance, Award Amount |  | 30.9
NIH Grant Subaward One [Member] |  |
Government Assistance, Award Amount |  | $ 7.3
NIH Grant [Member] |  |
Research and Development Arrangement with Federal Government, Costs Incurred, Net | $ 3.1 |

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- Definition Amount of government assistance awarded that comprises amount received, receivable, and to be received unless condition for government assistance is not met. Includes, but is not limited to, government grant, assistance, incentive, award, subsidy, and loan. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 832 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483507/832-10-50-3 + Details
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- Definition The net amount of research and development costs incurred for a fixed-price, best-efforts research and development cost-sharing arrangement with the Federal Government. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 912 -SubTopic 730 -Name Accounting Standards Codification -Section 25 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479532/912-730-25-1 + Details
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