Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-Based Compensation Expense for Employees and Non-Employees

Total share-based compensation expense recorded for employees and non-employees, is as follows (in thousands):

	Three Months Ended   September 30,				Nine Months Ended   September 30,
	2016		2015		2016		2015
Cost of revenues	$	46	$	103	$	115	$	318
Technology and development	3,449		3,464		11,207		9,444
Sales and marketing	1,605		126		5,456		6,214
General and administrative	5,110		5,240		15,923		15,808
Total share-based compensation expense	$	10,210	$	8,933	$	32,701	$	31,784

Summary of Restricted Stock Unit Activity

RSU and PSU Activity

	RSUs and PSUs Outstanding
	Number of RSUs and PSUs Outstanding		Weighted  Average Grant Date  Fair Value
Balance at December 31, 2015	13,270,650		$	6.38
Granted	9,620,354		4.44
Released	(4,558,359	)	6.48
Canceled	(3,931,959	)	6.09
Balance at September 30, 2016	14,400,686		$	5.13