Note 14 - License, Collaboration and Distribution Agreements - Total Revenues (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Total sales, net	$ 9,934	$ 6,599	$ 12,508
Transferred over Time [Member]
Total sales, net	434	1,473	1,453
Transferred at Point in Time [Member]
Total sales, net	$ 9,500	$ 5,126	$ 11,055