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Note 2 - Income (Loss) Per Share - Antidilutive Securities Excluded from Calculation of Diluted Income (Loss) Per Share (Details) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Total anti-dilutive securities (in shares) 8,850,434 1,292,306 8,850,434 1,292,306
Restricted Stock Units (RSUs) [Member]        
Total anti-dilutive securities (in shares) 817,384 993,975 817,384 993,975
Share-Based Payment Arrangement, Option [Member]        
Total anti-dilutive securities (in shares) 331,667 298,331 331,667 298,331
Warrant [Member]        
Total anti-dilutive securities (in shares) 7,701,383 0 7,701,383 0