Revenue (Tables)

9 Months Ended

Sep. 30, 2021

Revenue from Contract with Customer [Abstract]

Summary of Total Revenue by Type of Service

The following tables set forth total revenue by type of service for the three and nine months ended September 30, 2020 and 2021:

	Three Months Ended September 30,
(in thousands)	2020		2021
Screening services	$	116,313	$	168,372
Other services		1,289		1,185
Total revenue	$	117,602	$	169,557

	Nine Months Ended September 30,
(in thousands)	2020		2021
Screening services	$	320,596	$	463,763
Other services		4,954		4,492
Total revenue	$	325,550	$	468,255

Summary of Total Revenue by Geographic Area Based on the Billing Address of its Customers

The following tables set forth total revenue by geographic area based on the billing address of its customers for the three and nine months ended September 30, 2020 and 2021:

	Three Months Ended September 30,
(in thousands)	2020		2021
United States	$	98,606	$	139,564
All other countries		18,996		29,993
Total revenue	$	117,602	$	169,557

	Nine Months Ended September 30,
(in thousands)	2020		2021
United States	$	273,407	$	379,161
All other countries		52,143		89,094
Total revenue	$	325,550	$	468,255