REVENUE (Tables)

9 Months Ended

Sep. 30, 2021

Revenue from Contract with Customer [Abstract]

Schedule of revenue

The components of revenue were as follows:

	Three months ended September 30,				Nine months ended September 30,
(in thousands)	2021		2020		2021		2020
Service revenue	$	41,626	$	85,386	$	133,672	$	289,570
Reimbursable expenses	1,416		2,810		5,365		14,495
Non-controlling interests	201		599		712		1,516
Total	$	43,243	$	88,795	$	139,749	$	305,581

Disaggregation of revenue

Disaggregation of total revenues by major source is as follows:

(in thousands)	Revenue recognized when services are performed or assets are sold		Revenue related to technology platforms and professional services		Reimbursable expenses revenue		Total revenue
Three months ended September 30, 2021	$	38,147	$	3,680	$	1,416	$	43,243
Three months ended September 30, 2020	82,067		3,918		2,810		88,795
Nine months ended September 30, 2021	124,111		10,273		5,365		139,749
Nine months ended September 30, 2020	277,522		13,564		14,495		305,581