Common Stock and Stockholders' Equity (Deficit) (Tables)

3 Months Ended

Mar. 31, 2016

Schedule of Redeemable Convertible Preferred Stock into Common Stock

As a result of this amendment, the redeemable convertible preferred stock became convertible into shares of common stock upon a qualifying event, including completion of an initial public offering, as follows:

Preferred Stock	Number of Shares, Actual		Conversion Rate		Number of Shares, As Converted
Series A		1,319,940		1.0088		1,331,507
Series B		988,411		1.0148		1,003,071
Series C		4,019,524		1.0192		4,096,561
Series D		5,308,875		1.0218		5,424,802
Series E		2,439,058		1.0000		2,439,058
Series F		2,685,997		1.0000		2,685,997
Series G		3,692,684		1.0000		3,692,684
Total		20,454,489				20,673,680

Schedule of Restricted Stock Units Activity

A summary of the activity for the Company’s RSUs is presented below (in thousands, except per share amounts and contractual life years):

	Number of Shares			Weighted- Average Grant Date Fair Value (per share)		Weighted- Average Remaining Contractual Life (Years)		Aggregate Intrinsic Value
Unvested balance – December 31, 2015		—		$	—		—	$	—
Granted		404,938			13.39		—
Vested		(207,234	)		12.90		—
Forfeited		—			—		—
Unvested balance – March 31, 2016		197,704		$	13.91		4.2	$	2,635
Expected to vest – March 31, 2016		197,568		$	13.91		4.2	$	2,635

Schedule of Stock Option Activity

The following table summarizes the Company’s stock option activity for the three months ended March 31, 2016 (in thousands, except share and per share and contractual life amounts and years):

	Options Outstanding
	Number of Shares Underlying Outstanding Options			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life (Years)		Aggregate Intrinsic Value
Outstanding – December 31, 2015		4,311,463		$	9.87		7.9	$	22,709
Granted		513,569			13.77		10.0
Exercised		(102,050	)		2.96		—
Forfeited or cancelled		(75,036	)		11.99		—
Outstanding – March 31, 2016		4,647,946		$	10.41		8.0	$	15,959
Exercisable – March 31, 2016		2,176,598		$	7.10		6.7	$	14,001
Vested and expected to vest – March 31, 2016		4,553,559		$	10.35		7.9	$	15,909

Total intrinsic value of stock options exercised during the three months ended March 31, 2016 was $933,000.

Summary of Black-Scholes Option-Pricing Model to Determine Fair value of Stock Options

The following table summarizes the assumptions used in the Black-Scholes option-pricing model to determine the fair value of the Company’s stock options as follows:

	Three months ended March 31,
	2016		2015
Expected term (in years)	5.8		5.8
Expected volatility		45%		46%
Risk-free interest rate	1.3%-1.5%			1.4%
Dividend yield		0%		0%

Summary of Stock-Based Compensation Expenses

Total stock-based compensation expense was allocated as follows (in thousands):

	Three months ended March 31,
	2016		2015
Cost of revenue	$	215	$	100
Sales and marketing		583		541
Research and development		495		96
General and administrative		620		403
Total stock-based compensation expense	$	1,913	$	1,140