Stock-based Compensation (Tables)

6 Months Ended

Jun. 30, 2017

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

The range of assumptions for the three and six months ended June 30, 2016 and 2017, are provided in the following table:



	Three Months Ended June 30,		Six Months Ended June 30,
	2016	2017	2016	2017

Expected life	7 years	7 years	7 years	7 years
Volatility	39.81%	40.97%	39.81%-41.36%	37.88%-40.97%
Risk-free interest rate	1.51%	1.96%	1.51%-1.66%	1.96%-2.26%
Dividend yield	—%	—%	—%	—%
Weighted-average grant date fair value	3.96	4.89	3.99	4.86

Schedule of Stock Option Activity

The following table presents information regarding options granted, exercised, forfeited, or cancelled for the periods presented:



	Number Of Options	Weighted- Average Exercise Price		Weighted Average Remaining Contractual Life (years)	Aggregate Intrinsic Value
Outstanding at December 31, 2016	13,291,684	$	5.85	7.74	$	61,774
Options granted	1,137,046	10.78
Options exercised	(301,622)	3.37			2,294
Options forfeited or canceled	(344,707)	8.01
Outstanding at June 30, 2017	13,782,401	6.26		7.46	65,065
Options exercisable at June 30, 2017	7,827,279	$	4.38	6.34	$	51,683

Schedule of Allocation of Share-based Compensation Costs

The following table presents the detail of stock-based compensation amounts included in the Company’s consolidated statements of operations for the periods indicated below:



	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2017		2016		2017

Cost of revenue	$	525	$	699	$	1,043	$	1,414
Technology and development	559		751		1,098		1,482
Marketing	112		123		221		242
General and administrative	718		1,065		1,372		2,182
Total stock-based compensation	$	1,914	$	2,638	$	3,734	$	5,320