Concentration of credit risk (Tables)

9 Months Ended

Sep. 30, 2016

Accounts Receivable

Concentration of credit risk

Schedule of concentrations of 10% and greater

	As of		As of
	September 30,		December 31,
	2016		2015
Customer A	16	%	15	%
Customer B	13		*
Customer C	12		*
Customer H	*		11

* Less than 10% accounts receivable concentration.

Revenue

Concentration of credit risk

Schedule of concentrations of 10% and greater

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2016		2015		2016		2015
Customer A	16	%	17	%	16	%	19	%
Customer G	14		*		12		*
Customer H	*		13		*		*

* Less than 10% revenue concentration.