Note 9 - Earnings Per Share - Computation of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
EARNINGS PER SHARE
Net income	$ 1,962	$ 6,883
Weighted average shares used to compute basic EPS (in shares)	41,760	40,604
Dilutive effect of share-based awards (in shares)		48
Weighted average shares used to compute diluted EPS (in shares)	41,760	40,652
Basic (in dollars per share)	$ 0.05	$ 0.17
Diluted (in dollars per share)	$ 0.05	$ 0.17
Antidilutive shares	937,424