Stock-based Awards (Tables)

6 Months Ended

Jun. 30, 2017

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

Summary of stock option activity

A summary of the Company’s stock option activity for the six months ended June 30, 2017 is as follows:

	Number of Options		Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Life
					(in years)
Outstanding at December 31, 2016	24,541,512		$	8.29	5.49
Granted	4,661,639		18.47
Exercised	(9,596,374	)	5.80
Canceled/forfeited	(620,931	)	8.13
Outstanding at June 30, 2017	18,985,846		$	12.06	7.74

Schedule of activity in connection with restricted stock

Activity in connection with restricted stock units is as follows for the six months ended June 30, 2017:

	Number of Shares		Weighted- Average Grant Date Fair Value
Non-vested — December 31, 2016	4,339,320		$	7.85
Granted	1,974,776		18.33
Vested	(764,642	)	8.10
Canceled/forfeited	(230,545	)	7.46
Non-vested — June 30, 2017	5,318,909		$	11.72

Schedule of stock-based compensation cost relating to stock options and restricted stock awards

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,
	2017		2016		2017		2016
Cost of revenue	$	233	$	233	$	436	$	455
Sales and marketing	2,160		1,736		3,905		2,499
Technology and development	1,600		746		2,898		1,825
General and administrative	2,853		3,185		5,514		7,013
Total stock-based compensation expense	6,846		5,900		12,753		11,792
Amount capitalized to internal software use	332		223		550		468
Total stock-based compensation cost	$	7,178	$	6,123	$	13,303	$	12,260