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Note 13 - Subsequent Events (Details Textual) - USD ($)
$ in Millions
2 Months Ended
Nov. 12, 2024
Sep. 27, 2024
Nov. 12, 2024
Securities Purchase Agreement, Tranche Two [Member]      
Stock Issued During Period, Shares, New Issues (in shares)   3,600,902  
Securities Purchase Agreement [Member]      
Stock Issued During Period, Shares, New Issues (in shares)   3,630,129  
Proceeds from Issuance or Sale of Equity     $ 10.0
Subsequent Event [Member] | Pre-funded Warrants in Security Purchase Agreement Tranche Two [Member]      
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) 814,569   814,569
Subsequent Event [Member] | Securities Purchase Agreement, Tranche Two [Member]      
Stock Issued During Period, Shares, New Issues (in shares) 3,600,902    
Proceeds from Issuance or Sale of Equity $ 8.8    
Subsequent Event [Member] | Warrants in Security Purchase Agreement Tranche Two [Member]      
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) 4,415,471   4,415,471