Note 6 - Inventory - Components of Inventories (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Finished goods, gross	$ 15,899	$ 15,337
Finished goods, reserve	(4,221)	(4,129)
Finished goods, net	11,678	11,208
Raw materials, gross	4,770	4,718
Raw materials, reserve	(2,426)	(2,173)
Raw materials, net	2,344	2,545
Total inventory, gross	20,669	20,055
Total inventory, reserve	(6,647)	(6,302)
Total inventory, net	14,022	13,753
Current Portion, gross	10,318	9,399
Current Portion, reserve	(1,235)	(1,115)
Inventory	9,083	8,284
Long-term portion, gross	10,351	10,656
Long-term portion, reserve	(5,412)	(5,187)
Inventory, net of current portion	$ 4,939	$ 5,469