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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 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Total anti-dilutive securities (in shares) 1,391,291 1,221,730 1,391,291 1,221,730
Restricted Stock Units (RSUs) [Member]        
Total anti-dilutive securities (in shares) 993,623 916,563 993,623 916,563
Share-Based Payment Arrangement, Option [Member]        
Total anti-dilutive securities (in shares) 397,668 305,167 397,668 305,167