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Note 8 - Earnings Per Share (Details Textual) - shares
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Restricted Stock Units (RSUs) [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 2,832,909 561,862
Prefunded Warrants [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 31,440,000 1,015,000
Warrant [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 4,480,000  
Share-Based Payment Arrangement, Option [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 0 0