Concentrations (Tables)

12 Months Ended

Dec. 31, 2015

Revenue

Schedules of concentration of risk, by risk factor

	Year ended December 31,
	2015		2014		2013
Google	36	%	50	%	56	%

Accounts Receivable

Schedules of concentration of risk, by risk factor

	Year ended December 31,
	2015		2014
Google, Inc.	26	%	42	%