Note 13 - Segment Information - Net Revenue From Unaffiliated Customers (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Net revenues	$ 19,556	$ 11,230
UNITED STATES
Net revenues	5,747	5,719
Non-US [Member]
Net revenues	$ 13,809	$ 5,511