Note 10 - Earnings Per Share - Computation of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
EARNINGS PER SHARE
Net income	$ 41,471	$ 4,143
Weighted average shares used to compute basic EPS (in shares)	44,181	43,443
Weighted average shares used to compute diluted EPS (in shares)	44,908	43,443
Basic (in dollars per share)	$ 0.94	$ 0.10
Diluted (in dollars per share)	$ 0.92	$ 0.10
Antidilutive shares		937,424
Options
EARNINGS PER SHARE
Dilutive effect of stock-based awards (in shares)	605
Restricted Stock Units
EARNINGS PER SHARE
Dilutive effect of stock-based awards (in shares)	122