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Note 2 - Loss Per Share - Antidilutive Securities Excluded from Calculation of Diluted Income (Loss) Per Share (Details) - shares
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Total anti-dilutive securities (in shares) 752,003 1,234,849
Restricted Stock Units (RSUs) [Member]    
Total anti-dilutive securities (in shares) 449,673 878,349
Share-Based Payment Arrangement, Option [Member]    
Total anti-dilutive securities (in shares) 302,330 356,500