Significant Risk Concentrations (Tables)

9 Months Ended

Sep. 30, 2019

Risks And Uncertainties [Abstract]

Summary of Rebate Program Recorded Under Rebate Credits

Under this rebate program, we recorded rebate credits as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Reductions to cost of revenue	$	87	$	159	$	240	$	577
Reductions to marketing expense	$	597	$	294	$	1,027	$	673