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Note 2 - Income (Loss) Per Share - Basic and Diluted Income (Loss) Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Net loss $ (7,556) $ (7,944) $ (23,048) $ (25,847)
Weighted average shares outstanding (in shares) 27,797,444 16,164,301 24,207,259 14,495,341
Weighted average restricted shares vested not delivered (in shares) 299,572 287,972 290,251 287,912
Total basic weighted average shares outstanding (in shares) 28,097,016 16,452,273 24,497,510 14,783,253
Total diluted weighted average shares outstanding (in shares) 28,097,016 16,452,273 24,497,510 14,783,253
Basic (in dollars per share) $ (0.27) $ (0.48) $ (0.94) $ (1.75)
Diluted (in dollars per share) $ (0.27) $ (0.48) $ (0.94) $ (1.75)
Restricted Stock Units (RSUs) [Member]        
Dilutive effect of assumed conversion of restricted stock units (in shares) 0 0 0 0