Note 13 - Revenue and Geographic Information (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenue from Contract with Customer, Excluding Assessed Tax	$ 156,236	$ 147,794	$ 130,457
Revenues From Agreements as Percent of Total Revenue	43.00%	45.00%	49.00%
OA Pain Management [member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 97,887	$ 89,503	$ 83,029
Veterinary [Member] | OA Pain Management [member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 5,900	$ 4,400	$ 3,800