REVENUE (Tables)

6 Months Ended

Jun. 30, 2021

Revenue from Contract with Customer [Abstract]

Schedule of revenue

The components of revenue were as follows:

	Three months ended June 30,				Six months ended June 30,
(in thousands)	2021		2020		2021		2020
Service revenue	$	43,966	$	91,008	$	92,046	$	204,184
Reimbursable expenses	1,936		3,840		3,949		11,685
Non-controlling interests	139		494		511		917
Total	$	46,041	$	95,342	$	96,506	$	216,786

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 June 30, 2021	$	40,712	$	3,393	$	1,936	$	46,041
Three months ended June 30, 2020	87,447		4,055		3,840		95,342
Six months ended June 30, 2021	85,963		6,594		3,949		96,506
Six months ended June 30, 2020	195,455		9,646		11,685		216,786