Revenue (Tables)

6 Months Ended

Jun. 30, 2022

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following tables set forth total revenue by type of service for the periods presented:

	Three Months Ended June 30,				Six Months Ended June 30,
(in thousands)	2021		2022		2021		2022
Screening services	$	158,183	$	204,282	$	295,392	$	394,030
Other services	1,145		1,309		3,306		3,533
Total revenue	$	159,328	$	205,591	$	298,698	$	397,563

Revenue from External Customers by Geographic Areas

The following table sets forth total revenue by geographic area in which the revenues and invoicing are recorded for the periods presented:

	Three Months Ended June 30,				Six Months Ended June 30,
(in thousands)	2021		2022		2021		2022
United States	$	130,294	$	174,115	$	239,484	$	333,431
All other countries	29,034		31,476		59,214		64,132
Total revenue	$	159,328	$	205,591	$	298,698	$	397,563