Note 14 - License, Collaboration and Distribution Agreements - Total Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Total sales, net	$ 1,892	$ 1,491
Transferred over Time [Member]
Total sales, net	434	1,444
Transferred at Point in Time [Member]
Total sales, net	$ 1,458	$ 47