Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 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 June 30,				Six months ended June 30,
	2016		2015		2016		2015
Cost of revenue
Subscription and support	$	125	$	87	$	243	$	183
Professional services	93		89		215		161
Operating expenses
Research and development	609		369		1,193		703
Sales and marketing	449		432		904		782
General and administrative	2,226		1,643		4,337		2,965
Total	$	3,502	$	2,620	$	6,892	$	4,794

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 June 30,		Six months ended June 30,
	2016	2015	2016	2015
Expected term (in years)	6.1	6.1	6.0 - 6.1	6.1
Risk-free interest rate	1.41% - 1.54%	1.50% - 1.75%	1.41% - 1.90%	1.35% - 1.75%
Expected volatility	44.67% - 45.06%	42.74% - 43.55%	44.67% - 45.29%	42.35% - 44.08%
Forfeiture rate	4.64% - 5.15%	5.03% - 6.41%	0% - 5.15%	5.03% - 6.41%

Schedule of Stock-Option Activity

The following table summarizes the option activity under the Plans for the six months ended June 30, 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	786,469	14.56
Forfeited	159,837	14.67
Exercised	162,363	3.20
Outstanding at June 30, 2016	7,433,402	$	11.82	7.5	$	21,828
Exercisable at June 30, 2016	3,886,831	$	9.07	6.3	$	21,169

Schedule of Restricted Stock Activity

The following table summarizes the restricted stock activity under the Plan for the six months ended June 30, 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	381,952		15.11
Forfeited	—		—
Vested	(246,690	)	13.35
Outstanding at June 30, 2016	735,287		$	14.29	$	10,044