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Note 2 - 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, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Net loss $ (56,944) $ (5,179) $ (58,957) $ (11,437)
Weighted average shares outstanding (in shares) 79,793,240 78,270,386 79,479,049 77,574,295
Weighted average restricted shares vested not delivered (in shares) 1,700,581 1,691,889 1,714,058 1,986,348
Total basic weighted average shares outstanding (in shares) 81,493,821 79,962,275 81,193,107 79,560,643
Total diluted weighted average shares outstanding (in shares) 81,493,821 79,962,275 81,193,107 79,560,643
Basic (in dollars per share) $ (0.70) $ (0.06) $ (0.73) $ (0.14)
Diluted (in dollars per share) $ (0.70) $ (0.06) $ (0.73) $ (0.14)
Restricted Stock Units (RSUs) [Member]        
Dilutive effect of assumed conversion of restricted stock units (in shares) 0 0 0 0