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Note 8 - Revenue From Government Contract (Details Textual) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Dec. 31, 2022
Jun. 12, 2024
Revenue from Contract with Customer, Including Assessed Tax $ 300,677 $ 0 $ 300,677 $ 0 $ 0 $ 81,526  
BARDA [Member] | Allucent [Member]              
Government Assistance, Award Amount             $ 343,000,000
BARDA Contract [Member]              
Government Assistance, Award Amount             24,300,000
BARDA Contract [Member] | Grant [Member]              
Revenue from Contract with Customer, Including Assessed Tax $ 300,677   $ 300,677        
BARDA Contract [Member] | Maximum [Member]              
Government Assistance, Award Amount             $ 45,000,000