Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2016

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

Schedule of Stock-based Compensation Expense

Stock-based compensation expense associated with stock options and restricted stock was recorded in the following cost and expense categories consistent with the respective employee or service provider’s related cash compensation (in thousands):

	Three months ended March 31,
	2016		2015
Cost of revenue
Subscription and support	$	118	$	96
Professional services	122		72
Operating expenses
Research and development	584		334
Sales and marketing	455		350
General and administrative	2,111		1,322
Total	$	3,390	$	2,174

Schedule of Share-based Payment Award, Valuation Assumptions

The fair value of our stock options was estimated assuming no expected dividends and the following weighted-average assumptions:

	Three months ended March 31,
	2016	2015
Expected term (in years)	6.0 - 6.1	6.1
Risk-free interest rate	1.48% - 1.90%	1.35% - 1.74%
Expected volatility	44.96% - 45.29%	42.35% - 44.08%
Forfeiture rate	0% - 4.80%	5.12% - 5.21%

Schedule of Stock-Option Activity

The following table summarizes the option activity under the Plans for the three months ended March 31, 2016:

	Options	Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value
					(in thousands)
Outstanding at December 31, 2015	6,969,133	$	11.37	7.7	$	43,287
Granted	634,619	15.06
Forfeited	28,515	14.52
Exercised	74,621	3.80
Outstanding at March 31, 2016	7,500,616	$	11.75	7.6	$	17,721
Exercisable at March 31, 2016	3,613,938	$	8.40	6.3	$	17,337

Schedule of Restricted Stock Activity

The following table summarizes the restricted stock activity under the Plan for the three months ended March 31, 2016:

	Number of Shares		Weighted- Average Grant Date Fair Value		Aggregate Intrinsic Value
					(in thousands)
Outstanding at December 31, 2015	600,025		$	13.38	$	10,542
Granted	311,612		15.55
Forfeited	—		—
Vested	(176,665	)	13.40
Outstanding at March 31, 2016	734,972		$	14.29	$	8,562