Stock-based Awards

6 Months Ended

Jun. 30, 2015

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

Stock based awards

Stock-based Awards

Stock Options

A summary of the Company’s stock option activity for the six months ended June 30, 2015 is as follows:

	Number of Options		Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Life
					(in years)
Outstanding at December 31, 2014	25,589,876		$	9.79	7.55
Granted	1,538,184		16.17
Exercised	(1,268,087	)	4.11
Canceled/forfeited	(509,987	)	12.14
Outstanding at June 30, 2015	25,349,986		$	10.41	7.26

At June 30, 2015, total remaining stock-based compensation expense for unvested stock option awards was $57.4 million, which is expected to be recognized over a weighted-average period of 2.8 years. For the three months ended June 30, 2015 and 2014, the Company recorded stock-based compensation expense for stock option awards of $7.3 million and $7.1 million, respectively. For the six months ended June 30, 2015 and 2014, the Company recorded stock-based compensation expense for stock option awards of $14.3 million and $11.2 million, respectively.

Restricted Stock Units

Activity in connection with restricted stock units is as follows for the six months ended June 30, 2015:

	Number of Shares		Weighted- Average Grant Date Fair Value
Non-vested — December 31, 2014	827,997		$	12.36
Granted	825,884		15.92
Vested	(256,025	)	15.17
Canceled/forfeited	(126,552	)	11.44
Non-vested — June 30, 2015	1,271,304		$	14.20

At June 30, 2015, total remaining stock-based compensation expense for non-vested restricted stock units is $14.5 million, which is expected to be recognized over a weighted-average period of 3.5 years. The Company recorded $1.8 million and $0.3 million in stock-based compensation expense for restricted stock units for the three months ended June 30, 2015 and 2014, respectively. The Company recorded $4.3 million and $0.3 million in stock-based compensation expense for restricted stock units for the six months ended June 30, 2015 and 2014, respectively.

Stock-based Compensation Cost

The Company recorded stock-based compensation cost relating to stock options and restricted stock awards in the following categories on the accompanying consolidated statements of comprehensive loss (in thousands):

	Three Months Ended   June 30,				Six Months Ended June 30,
	2015		2014		2015		2014
Cost of revenue	$	187	$	113	$	364	$	163
Sales and marketing	1,218		1,307		2,608		2,344
Technology and development	1,227		1,156		2,153		1,865
General and administrative	6,535		4,820		13,495		7,168
Total stock-based compensation expense	9,167		7,396		18,620		11,540
Amount capitalized to internal software use	344		321		675		614
Total stock-based compensation cost	$	9,511	$	7,717	$	19,295	$	12,154