Note 14 - License, Collaboration and Distribution Agreements - Total Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Total sales, net	$ 1,807	$ 1,892
Transferred over Time [Member]
Total sales, net	575	434
Transferred at Point in Time [Member]
Total sales, net	$ 1,232	$ 1,458