Note 10 - Significant Risk Concentrations (Tables)

9 Months Ended

Sep. 30, 2021

Notes Tables

Schedule of Rebate Credit [Table Text Block]

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Reductions to cost of revenue	$	26	$	500	$	236	$	654
Reductions to marketing expense		110		123		287		1,026