Revenue (Tables)

6 Months Ended

Jun. 30, 2022

Revenue from Contract with Customer [Abstract]

Summary of revenue

The following table presents a summary of revenue:

	Three Months Ended June 30,				Six Months Ended June 30,
(in thousands)	2022		2021		2022		2021
Subscription revenue	$	146,806	$	114,167	$	289,493	$	221,569
Perpetual license and maintenance revenue	12,683		12,567		25,556		24,972
Professional services and other revenue	4,852		3,525		8,660		6,907
Revenue	$	164,341	$	130,259	$	323,709	$	253,448

Activity of deferred contract costs

The following summarizes the activity of deferred incremental costs of obtaining a contract:

	Three Months Ended June 30,				Six Months Ended June 30,
(in thousands)	2022		2021		2022		2021
Beginning balance	$	99,263	$	77,300	$	99,949	$	78,876
Capitalization of contract acquisition costs	12,073		10,222		22,403		17,446
Amortization of deferred contract acquisition costs	(11,336)		(9,025)		(22,352)		(17,825)
Ending balance	$	100,000	$	78,497	$	100,000	$	78,497