Concentration of credit risk (Tables)

9 Months Ended

Sep. 30, 2017

Accounts Receivable

Concentration of credit risk

Schedule of concentrations of 10% and greater

	As of		As of
	September 30,		December 31,
	2017		2016
Customer A	18	%	22	%
Customer B	12		17

Revenue

Concentration of credit risk

Schedule of concentrations of 10% and greater

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Customer A	18	%	16	%	19	%	16	%
Customer G	*		14		*		12

* Less than 10% revenue concentration.