REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation of revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Net revenues	$ 89,782	$ 75,248	$ 186,490	$ 157,880
Supplemental Benefit Services
Disaggregation of Revenue [Line Items]
Net revenues	45,954	32,964	96,182	72,069
Health Plan Management
Disaggregation of Revenue [Line Items]
Net revenues	24,035	21,166	49,897	45,107
Consulting Services
Disaggregation of Revenue [Line Items]
Net revenues	13,670	15,327	29,453	29,414
Software Services
Disaggregation of Revenue [Line Items]
Net revenues	2,648	2,194	4,925	4,925
Data Analytics
Disaggregation of Revenue [Line Items]
Net revenues	3,475	3,597	6,033	6,365
Technology Enabled Solutions
Disaggregation of Revenue [Line Items]
Net revenues	75,619	61,366	158,785	130,949
Technology Enabled Solutions | Supplemental Benefit Services
Disaggregation of Revenue [Line Items]
Net revenues	45,954	32,964	96,182	72,069
Technology Enabled Solutions | Health Plan Management
Disaggregation of Revenue [Line Items]
Net revenues	24,035	21,166	49,897	45,107
Technology Enabled Solutions | Consulting Services
Disaggregation of Revenue [Line Items]
Net revenues	(473)	1,445	1,853	2,483
Technology Enabled Solutions | Software Services
Disaggregation of Revenue [Line Items]
Net revenues	2,628	2,194	4,820	4,925
Technology Enabled Solutions | Data Analytics
Disaggregation of Revenue [Line Items]
Net revenues	3,475	3,597	6,033	6,365
Advisory Services
Disaggregation of Revenue [Line Items]
Net revenues	14,163	13,882	27,705	26,931
Advisory Services | Supplemental Benefit Services
Disaggregation of Revenue [Line Items]
Net revenues	0	0	0	0
Advisory Services | Health Plan Management
Disaggregation of Revenue [Line Items]
Net revenues	0	0	0	0
Advisory Services | Consulting Services
Disaggregation of Revenue [Line Items]
Net revenues	14,143	13,882	27,600	26,931
Advisory Services | Software Services
Disaggregation of Revenue [Line Items]
Net revenues	20	0	105	0
Advisory Services | Data Analytics
Disaggregation of Revenue [Line Items]
Net revenues	$ 0	$ 0	$ 0	$ 0