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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 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Net income (loss) $ 4,251 $ (56,944) $ (27,692) $ (58,957)
Weighted average shares outstanding (in shares) 81,012,997 79,793,240 80,613,857 79,479,049
Weighted average restricted shares vested not delivered (in shares) 1,714,974 1,700,581 1,709,997 1,714,058
Total basic weighted average shares outstanding (in shares) 82,727,971 81,493,821 82,323,854 81,193,107
Total diluted weighted average shares outstanding (in shares) 82,752,646 81,493,821 82,323,854 81,193,107
Basic (in dollars per share) $ 0.05 $ (0.70) $ (0.34) $ (0.73)
Diluted (in dollars per share) $ 0.05 $ (0.70) $ (0.34) $ (0.73)
Restricted Stock Units (RSUs) [Member]        
Dilutive effect of assumed conversion of restricted stock units (in shares) 24,675 0 0 0