Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2018

Schedule of Fair Value of Level 3 Instruments

The following table represents the activity of the fair value of Level 3 instruments (in thousands):

	Three Months Ended
	March 31, 2017
Convertible preferred stock warrant    liability — beginning balance	$	9,990
Fair value of new warrants issued		—
Change in fair value of preferred stock warrant liability		735
Convertible preferred stock warrant    liability — ending balance	$	10,725

Net Revenue

Schedules of Customer Concentration by Risk Factor

Customers accounting for 10% or more of the Company’s net revenue were as follows:

	Three Months Ended
	March 31, 2018			March 31, 2017
Customer B		10	%		13	%
Customer C		17			21
Customer E	*				13
Customer G	11			*

Accounts Receivable

Schedules of Customer Concentration by Risk Factor

Customers accounting for 10% or more of the Company’s accounts receivable were as follows:

	As of
	March 31, 2018			December 31, 2017
Customer C		11	%	* %
Customer D		16			16

* Less than 10%