Note 11 - Revenue (Tables)

6 Months Ended

Jun. 30, 2020

Notes Tables

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	Three Months Ended June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
Joint pain management	$	22,247	$	26,632	$	47,730	$	49,482
Orthopedic joint preservation and restoration		6,622		802		14,518		966
Other		1,809		2,979		3,827		4,682
	$	30,678	$	30,413	$	66,075	$	55,130

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

	Three Months Ended June 30,
	2020					2019
	Total		Percentage of			Total		Percentage of
	Revenue		Revenue			Revenue		Revenue
Geographic Location:
United States	$	25,133		82	%	$	22,937		76%
Europe		2,910		9	%		4,927		16%
Other		2,635		9	%		2,554		8%
Total	$	30,678		100	%	$	30,418		100%

	Six Months Ended June 30,
	2020					2019
	Total		Percentage of			Total		Percentage of
	Revenue		Revenue			Revenue		Revenue
Geographic Location:
United States	$	51,438		78	%	$	43,026		78%
Europe		8,186		12	%		7,454		14%
Other		6,451		10	%		4,661		8%
Total	$	66,075		100	%	$	55,141		100%