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Note 16 - Subsequent Events (Details Textual) - USD ($)
 3 Months Ended 9 Months Ended
Oct. 30, 2023
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Common Stock, Par or Stated Value Per Share (in dollars per share)   $ 0.0001   $ 0.0001   $ 0.0001
Class of Warrant or Right, Issued During Period (in shares)   0 0 0 0  
Subsequent Event [Member] | The Note [Member] | Senior Secured Promissory Note [Member]            
Repayments of Notes Payable $ 1,400,000          
Subsequent Event [Member] | Pre-Funded Warrants [Member]            
Class of Warrant or Right, Issued During Period (in shares) 17,200,000          
Class of Warrant or Right, Issued During Period, Price Per Share (in dollars per share) $ 0.175          
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) $ 0.001          
Subsequent Event [Member] | Common Warrants [Member]            
Class of Warrant or Right, Issued During Period (in shares) 21,430,000          
Class of Warrant or Right, Issued During Period, Price Per Share (in dollars per share) $ 0.175          
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) $ 0.175          
Warrants and Rights Outstanding, Term (Year) 5 years          
Subsequent Event [Member] | Public Offering [Member]            
Units Issued During Period, Units, New Issues (in shares) 21,430,000          
Stock Issued During Period, Shares, New Issues (in shares) 4,230,000          
Common Stock, Par or Stated Value Per Share (in dollars per share) $ 0.0001          
Proceeds from Issuance or Sale of Equity $ 3,300,000