Revenue (Tables)

9 Months Ended

Sep. 30, 2021

Revenue From Contract With Customer [Abstract]

Summary of Revenues by Revenue Stream

We derive our revenues from the following revenue streams:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(in thousands)	2021		2020		2021		2020
Recurring revenues:
Fulfillment	$	78,106	$	64,115	$	224,738	$	183,963
Analytics		10,858		9,826		31,383		28,809
Other		1,435		1,244		4,019		3,664
Recurring Revenues		90,399		75,185		260,140		216,436
One-time revenues		7,488		4,372		22,380		12,886
	$	97,887	$	79,557	$	282,520	$	229,322

Summary of Deferred Revenue Liability Relating to Set-Up Fees

The table below presents the activity of the portion of the deferred revenue liability relating to set-up fees:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
(in thousands)	2021			2020			2021			2020
Balance, beginning of period	$	13,344		$	10,633		$	11,118		$	10,518
Invoiced set-up fees		3,622			2,757			11,832			8,224
Amortized set-up fees		(3,245	)		(2,698	)		(9,229	)		(8,050	)
Balance, end of period	$	13,721		$	10,692		$	13,721		$	10,692