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Note 13 - Subsequent Events (Details Textual) - Subsequent Event [Member]
$ / shares in Units, $ in Millions
Nov. 07, 2024
USD ($)
$ / shares
shares
Nov. 01, 2024
Oct. 31, 2024
Percentage of Workforce   25.00%  
Number of Directors   5 8
Prefunded Warrants [Member]      
Class of Warrant or Right, Outstanding (in shares) 2,934,690    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares $ 0.001    
Registered Direct Offering [Member]      
Proceeds from Issuance or Sale of Equity | $ $ 7    
Stock Issued During Period, Shares, New Issues (in shares) 3,000,000