Note 7 - Inventories - Components of Inventories (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Finished goods, gross	$ 15,337	$ 13,066
Finished goods, reserve	(4,129)	(2,987)
Finished goods, net	11,208	10,079
Raw materials, gross	4,718	8,324
Raw materials, reserve	(2,173)	(2,695)
Raw materials, net	2,545	5,629
Total inventories, gross	20,055	21,390
Total inventories, reserve	(6,302)	(5,682)
Total inventories, net	13,753	15,708
Current Portion, gross	9,399	9,931
Current Portion, reserve	(1,115)	(1,297)
Inventories	8,284	8,634
Long-term portion, gross	10,656	11,459
Long-term portion, reserve	(5,187)	(4,385)
Inventories, net of current portion	$ 5,469	$ 7,074