Note 6 - Inventory - Components of Inventories (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Finished goods, gross	$ 11,750	$ 15,337
Finished goods, reserve	(2,324)	(4,129)
Finished goods, net	9,426	11,208
Raw materials, gross	5,308	4,718
Raw materials, reserve	(2,411)	(2,173)
Raw materials, net	2,897	2,545
Total inventories, gross	17,058	20,055
Total inventories, reserve	(4,735)	(6,302)
Total inventories, net	12,323	13,753
Current Portion, gross	7,380	9,399
Current Portion, reserve	(697)	(1,115)
Inventory, net	6,683	8,284
Long-term portion, gross	9,678	10,656
Long-term portion, reserve	(4,038)	(5,187)
Inventory, net of current portion	$ 5,640	$ 5,469