Stock-based Compensation (Tables)

9 Months Ended

Sep. 30, 2017

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

Schedule of Value Assumptions

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

	Three Months Ended September 30,		Nine Months Ended September 30,
	2016	2017	2016	2017
Expected life	7 years	N/A	7 years	7 years
Volatility	38.88%-38.90%	N/A	38.88%-41.36%	37.88%-40.97%
Risk-free interest rate	1.39%-1.41%	N/A	1.39%-1.66%	1.96%-2.26%
Dividend yield	—%	N/A	—%	—%
Weighted-average grant date fair value	3.43	N/A	3.75	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	(660,634)	3.81			14,058
Options forfeited or canceled	(469,757)	7.87
Outstanding at September 30, 2017	13,298,339	6.30		7.27	249,825
Options exercisable at September 30, 2017	8,151,136	$	4.69	6.34	$	166,304

Schedule of Allocation of Share-based Compensation Costs

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2016		2017		2016		2017
Cost of revenue	$	546	$	715	$	1,589	$	2,129
Technology and development	555		819		1,653		2,301
Marketing	114		121		336		362
General and administrative	940		1,054		2,312		3,236
Total stock-based compensation	$	2,155	$	2,709	$	5,890	$	8,028