Note 10 - Significant Risk Concentrations (Tables)

9 Months Ended

Sep. 30, 2020

Notes Tables

Schedule of Rebate Credit [Table Text Block]

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Reductions to cost of revenue	$	500	$	87	$	654	$	240
Reductions to marketing expense	$	123	$	597	$	1,026	$	1,027