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, 2021	Mar. 31, 2020
EARNINGS PER SHARE
Net income	$ 4,143	$ 1,962
Weighted average shares used to compute basic EPS (in shares)	43,443	41,760
Weighted average shares used to compute diluted EPS (in shares)	43,443	41,760
Basic (in dollars per share)	$ 0.10	$ 0.05
Diluted (in dollars per share)	$ 0.10	$ 0.05
Antidilutive shares	937,424