Equity Incentive Plans (Tables)

9 Months Ended

Oct. 31, 2017

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

The following table summarizes stock option and RSU award activity for the 2008 and 2016 Plans (in thousands, except share and per share data and years):



			Options Outstanding
	Shares Available for Grant		Shares		Weighted- Average Exercise Price Per Share		Weighted- Average Remaining Contractual Term (In Years)	Aggregate Intrinsic Value
Balance - January 31, 2017	678,260		11,090,597		$	6.47	8.2	$	21,717
Authorized	3,000,000		—		—
Options granted	(3,596,525	)	3,596,525		10.57
Options exercised	—		(1,242,172	)	7.54
Early exercised shares repurchased	21,721		—		—
Options forfeited and expired	669,623		(669,623	)	7.49
RSUs granted	(54,550	)
Balance - October 31, 2017	718,529		12,775,327		7.56		8.0	292,772
Options vested and exercisable - January 31, 2017			4,344,092		6.21		7.3	9,875
Options vested and exercisable - October 31, 2017			5,011,187		$	6.29	6.8	$	121,224

Schedule of stock option valuation assumptions

The fair value of stock options granted was estimated on the date of grant using the Black-Scholes option pricing model with the following assumptions:



	Three Months Ended October 31,		Nine Months Ended October 31,
	2017	2016	2017	2016
Expected term (in years)	5.97 - 6.11	5.91 - 6.08	5.85 - 6.20	5.77 - 6.99
Expected volatility	44.6% - 45.7%	41.4% - 41.5%	41.9% - 45.7%	41.4% - 42.5%
Risk-free interest rate	1.8% - 2.1%	1.4 %	1.8% - 2.1%	1.2% - 1.5%
Dividend yield	0%	0%	0%	0%

Schedule of ESPP valuation assumptions

The fair value of the purchase rights granted under the 2017 ESPP was estimated on the first day of the offering period using the Black-Scholes option-pricing model with the following assumptions:



	Three Months Ended October 31,
	2017
Expected term (in years)	0.67 - 0.7
Expected volatility	23% - 24%
Risk-free interest rate	1.2%
Dividend yield	0%

Schedule of stock-based compensation expense recognized in consolidated statements of operations

Total stock-based compensation expense recognized in the Company’s unaudited condensed consolidated statements of operations is as follows (in thousands):



	Three Months Ended October 31,				Nine Months Ended October 31,
	2017		2016		2017		2016
Cost of revenue—subscription		$183		$131		$503		$425
Cost of revenue—services	123		70		292		397
Sales and marketing	1,704		1,095		4,400		4,346
Research and development	1,505		1,206		4,072		4,518
General and administrative	2,184		1,732		5,799		6,831
Total stock-based compensation expense	$	5,699	$	4,234	$	15,066	$	16,517