Note 12 - Revenue and Geographic Information (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

Revenue from External Customers by Products and Services [Table Text Block]

	Years Ended December 31,
	2023					2022					2021
	Revenue		Percentage of Product Revenue			Revenue		Percentage of Product Revenue			Revenue		Percentage of Product Revenue
OA Pain Management	$	101,927		61	%	$	91,984		59	%	$	85,084		58	%
Joint Preservation and Restoration		54,879		33	%		50,402		32	%		48,588		33	%
Non-Orthopedic		9,856		6	%		13,850		9	%		14,122		9	%
Total	$	166,662		100	%	$	156,236		100	%	$	147,794		100	%

Schedule of Revenue and Operating Income by Geographical Areas [Table Text Block]

	Years Ended December 31,
	2023					2022					2021
	Total		Percentage of			Total		Percentage of			Total		Percentage of
	Revenue		Revenue			Revenue		Revenue			Revenue		Revenue
Geographic Location:
United States	$	123,129		74	%	$	119,151		76	%	$	113,833		77	%
Europe		21,724		13	%		20,639		13	%		19,580		13	%
Other		21,809		13	%		16,446		11	%		14,381		10	%
Total	$	166,662		100	%	$	156,236		100	%	$	147,794		100	%

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]

	As of December 31,
	2023		2022
United States	$	45,077	$	47,068
Italy		1,075		1,211
United Kingdom		46		-
Total	$	46,198	$	48,279