Note 10 - Revenue and Geographic Information (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenue from Contract with Customer, Excluding Assessed Tax	$ 37,924	$ 36,693
Revenues From Agreements as Percent of Total Revenue	43.00%	39.00%
OA Pain Management [member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 22,633	$ 20,964
Veterinary [Member] | OA Pain Management [member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 500	$ 1,800