Note 14 - Earnings (Loss) Per Share - Computation of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
EARNINGS PER SHARE
Net income (loss)	$ 39,759	$ (4,907)	$ 24,934
Weighted average shares used to compute basic EPS (in shares)	43,964,000	42,460,000	40,838,000
Dilutive effect of stock-based awards (in shares)	293,000
Weighted average shares used to compute diluted EPS (in shares)	44,257,000	42,460,000	40,838,000
Basic (in dollars per share)	$ 0.90	$ (0.12)	$ 0.61
Diluted (in dollars per share)	$ 0.90	$ (0.12)	$ 0.61
Antidilutive shares	937,424	937,424