Note 14 - Segment Information - Net Revenue From Unaffiliated Customers (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net revenues	$ 21,144	$ 14,443	$ 62,520	$ 38,948
UNITED STATES
Net revenues	6,271	5,562	18,650	16,235
Non-US [Member]
Net revenues	$ 14,873	$ 8,881	$ 43,870	$ 22,713