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

12 Months Ended

Jan. 31, 2017

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock Option Activity

The following table summarizes stock option activity under the Company’s 2006 Stock Plan and the 2016 Plan during the year ended January 31, 2017 (aggregate intrinsic value in thousands):

	Options Outstanding
	Outstanding Stock Options			Weighted- Average Exercise Price		Weighted- Average Remaining ContractualLife (in years)		Aggregate Intrinsic Value
Balance, January 31, 2016		9,543,966		$	2.84		8.08	$	47,658
Option grants		5,573,721		$	9.75
Options exercised		(1,184,708	)	$	3.59
Options forfeited		(916,577	)	$	4.72
Balance, January 31, 2017		13,016,402		$	5.60		7.92	$	265,542
Vested and expected to vest at January 31, 2017		12,043,481		$	5.34		7.84	$	248,821
Exercisable at January 31, 2017		6,859,340		$	3.63		7.18	$	153,406

Summary of Activity Related to RSUs

The following table summarizes the activity related to the Company’s RSUs:

	Number of RSUs Outstanding			Weighted-Average Grant Date Fair Value
Awarded and unvested at January 31, 2016		62,500		$	5.20
Awards granted		52,466		$	26.12
Awards vested		(27,343	)	$	5.36
Awards forfeited		(9,740	)	$	12.14
Awarded and unvested at January 31, 2017		77,883		$	18.38

Total Stock-Based Compensation Expense

The Company’s total stock-based compensation expense was as follows (in thousands):

	For the year ended
	January 31,
	2017		2016		2015
Cost of revenue:
Subscription services	$	715	$	235	$	109
Professional services and other		772		1,014		110
Research and development		1,766		1,236		337
Sales and marketing		3,130		1,347		433
General and administrative		3,069		6,736		818
Total	$	9,452	$	10,568	$	1,807

Assumptions used to Estimate Fair Values of Stock Options Granted

The fair values of the Company’s stock options granted during the years ended January 31, 2017, 2016 and 2015 were estimated using the following assumptions:

	For the year ended
	January 31,
	2017		2016		2015
Employee Stock Options
Expected term (years)	6.00		5.70 - 6.00		6.08
Volatility		48%		48%	48% - 52%
Weighted average volatility		48%		48%		51%
Risk-free interest rate	1.27% - 2.08%		1.62% - 1.94%		1.80% - 2.00%
Dividend yield		0%		0%		0%
Employee Stock Purchase Plan
Expected term (years)	0.41 - 1.91			—		—
Volatility		48%		—		—
Weighted average volatility		48%		—		—
Risk-free interest rate	0.48% - 0.81%			—		—
Dividend yield		0%		—		—
Market-Based Options
Expected term (years)	7.36			—		—
Volatility		48%		—		—
Weighted average volatility		48%		—		—
Risk-free interest rate		1.61%		—		—
Dividend yield		0%		—		—