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Note 6 - Fair Value Measurements - Consideration and Methods for Valuing (Details) (Parentheticals) - USD ($)
12 Months Ended
Dec. 31, 2023
Mar. 17, 2023
Cash for stock   $ 3,000,000
GMI Subsidiary [Member]    
Cash for stock $ 3,000,000  
Contingent payments, term (Year) 7 years  
Contingent payments, discount rate 40.80%