Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2021

Summary of Stock-Based Compensation

The stock-based compensation expense was recorded as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Cost of revenue – maintenance and other services	$	1,411	$	684	$	3,791	$	1,602
Research and development		3,894		2,428		11,223		5,686
Sales and marketing		3,673		1,949		10,800		3,949
General and administrative		1,955		1,173		5,415		2,702
Total stock-based compensation expense	$	10,933	$	6,234	$	31,229	$	13,939

2017 Plan [Member]

Summary of Restricted Stock Units Awarded

The following table summarizes the restricted stock units, or RSUs, awarded under the 2017 Plan for the period:

	Number of RSUs
Outstanding as of January 1, 2021		1,154,936
Granted		338,270
Vested		(359,773	)
Forfeited		(69,801	)
Outstanding as of September 30, 2021		1,063,632

Summary of Stock Option Activity

The following table summarizes the stock option activity under the 2017 Plan for the period:

	Number of options			Weighted average exercise price per share		Weighted average remaining contractual term (years)		Aggregate intrinsic value (in millions)
Outstanding as of January 1, 2021		4,203,482		$	45.68		9.7
Granted		221,153		$	61.11
Exercised		(20,681	)	$	41.96
Forfeited		(182,471	)	$	47.08
Outstanding as of September 30, 2021		4,221,483		$	46.44		8.9
Exercisable as of September 30, 2021		21,792		$	31.85		8.2	$	0.8