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Note 8 - Warrants (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
Jul. 03, 2023
Jun. 29, 2023
Registered Direct Offering [Member]    
Proceeds from Issuance or Sale of Equity $ 10,000  
Proceeds from Issuance of Warrants $ 7,717  
Warrants Issued in Registered Direct Offering [Member]    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights   6,896,553
Class of Warrant or Right, Exercise Price of Warrants or Rights   $ 1.45
Warrants and Rights Outstanding, Term   5 years