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Note 3 - Income (Loss) Per Share - Antidilutive Securities Excluded from Calculation of Diluted Income (Loss) Per Share (Details) - shares
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Total anti-dilutive securities (in shares) 1,199,192 1,033,871
Restricted Stock Units (RSUs) [Member]    
Total anti-dilutive securities (in shares) 801,525 731,538
Share-Based Payment Arrangement, Option [Member]    
Total anti-dilutive securities (in shares) 397,667 302,333
Warrant [Member]    
Total anti-dilutive securities (in shares) 0 0