Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2017

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

Summary of Assumptions Used to Estimate the Fair Value of Stock Options Granted

The following table summarizes the assumptions used to estimate the fair value of stock options granted during the three and nine months ended September 30, 2017 and 2016:

	Three Months Ended September 30,		Nine Months Ended September 30,
	2017	2016	2017	2016
Risk-free interest rate	1.9% - 2.1%	1.3%	1.9% - 2.2%	1.3% - 1.5%
Expected term (in years)	6.5	6.5	6.5	6.5
Expected volatility	38.6%	41.6%	38.6% - 40.6%	41.2% - 42.0%
Expected dividend yield	—%	—%	—%	—%

Summary of the Stock Option Activity

The following table summarizes the stock option activity for the nine months ended September 30, 2017:

	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value (in thousands)
Outstanding at January 1, 2017	6,784,448		$	4.65	6.5	$	44,259
Granted	1,252,200		11.89
Exercised	(556,220	)	1.19			8,386
Canceled	(96,500	)	6.30
Outstanding at September 30, 2017	7,383,928		6.16		6.7	164,688
Exercisable at September 30, 2017	2,992,648		1.85		3.8	79,636

Schedule of Restricted Stock Unit Activity

The following table summarizes the restricted stock unit activity for the nine months ended September 30, 2017:

	Number of Shares		Weighted Average Grant Date Fair Value
Non-vested outstanding at December 31, 2016	—		$	—
Granted	47,855		20.38
Vested	(4,930	)	20.24
Canceled	—		—
Non-vested outstanding at September 30, 2017	42,925		20.40

Schedule of Components of Stock-based Compensation Expense

The following table summarizes the components of our stock-based compensation expense for the three and nine months ended September 30, 2017 (in thousands):

	Three Months Ended		Nine Months Ended
	September 30, 2017		September 30, 2017
Stock-based compensation expense related to stock option modifications	$	—	$	2,394
Cumulative stock-based compensation expense related to stock options recorded upon effectiveness of our IPO	—		6,236
Post-IPO stock-based compensation expense related to stock options	1,440		2,025
Stock-based compensation expense related to the issuance of common stock to directors	—		130
Stock-based compensation expense related to restricted stock units	134		134
Total stock-based compensation expense	$	1,574	$	10,919

Schedule of Stock-based Compensation Expense Included in Condensed Consolidated Statements of Operations

Stock-based compensation expense for restricted stock units, stock options and issuances of common stock is included in the following line items in the accompanying condensed consolidated statements of operations for the three and nine months ended September 30, 2017 (in thousands):

	Three Months Ended		Nine Months Ended
	September 30, 2017		September 30, 2017
Cost of revenue
Subscriptions, software and support	$	80	$	484
Professional services	142		1,126
Operating expenses
Sales and marketing	359		2,782
Research and development	256		2,458
General and administrative	737		4,069
Total stock-based compensation expense	$	1,574	$	10,919