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Note 11 - Loss Per Share (Details Textual) - shares
6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Restricted Stock Units (RSUs) [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 405,553 341,545
Prefunded Warrants [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 3,930,008 3,930,008
Warrant [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 1,091,346 560,096