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Note 10 - Revenue From Government Contract (Details Textual) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Dec. 31, 2023
Revenue from Contract with Customer, Including Assessed Tax $ 852,282 $ 300,677 $ 2,489,145 $ 300,677 $ 3,954,576 $ 0
BARDA Contract [Member]            
Government Assistance, Award Amount         26,200,000  
BARDA Contract [Member] | Grant [Member]            
Revenue from Contract with Customer, Including Assessed Tax $ 852,282 $ 300,677 $ 2,489,145 $ 300,677 3,954,546  
BARDA Contract [Member] | Minimum [Member]            
Government Assistance, Award Amount         $ 45,000,000