Stock-Based Compensation Expense

9 Months Ended

Sep. 30, 2017

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-Based Compensation Expense

10. Stock-Based Compensation Expense

The following two tables show stock-based compensation expense by award type and where the stock-based compensation expense is recorded in the Company’s consolidated statements of operations:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2017		2016		2017		2016
	(in thousands)				(in thousands)
Options	$	1,246	$	1,372	$	3,863	$	4,294
RSUs		10,521		7,045		29,680		18,296
Employee stock purchase plan		343		278		876		811
Total stock-based compensation expense	$	12,110	$	8,695	$	34,419	$	23,401

Effect of stock-based compensation expense on income by line item:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2017		2016		2017		2016
	(in thousands)				(in thousands)
Cost of revenue, subscription	$	163	$	139	$	455	$	363
Cost of revenue, service		591		438		1,707		1,238
Research and development		3,110		2,341		9,013		6,371
Sales and marketing		5,015		3,473		13,889		9,368
General and administrative		3,231		2,304		9,355		6,061
Total stock-based compensation expense	$	12,110	$	8,695	$	34,419	$	23,401

Capitalized software development costs excluded from stock-based compensation expense is $414 thousand for the three months ended September 30, 2017, $1.2 million for the nine months ended September 30, 2017, $326 thousand for the three months ended September 30, 2016 and $832 thousand for the nine months ended September 30, 2016.