REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation of revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Net revenues	$ 82,411	$ 69,528	$ 240,290	$ 195,833
Product Revenue
Disaggregation of Revenue [Line Items]
Net revenues	38,220	32,321	110,288	91,019
Health Plan Management
Disaggregation of Revenue [Line Items]
Net revenues	20,750	18,334	65,856	55,795
Consulting Services
Disaggregation of Revenue [Line Items]
Net revenues	14,761	11,441	44,174	32,587
Software Services
Disaggregation of Revenue [Line Items]
Net revenues	5,778	5,060	10,704	9,139
Data Analytics
Disaggregation of Revenue [Line Items]
Net revenues	2,902	2,372	9,268	7,293
Technology Enabled Solutions
Disaggregation of Revenue [Line Items]
Net revenues	69,248	60,056	200,196	166,850
Technology Enabled Solutions | Product Revenue
Disaggregation of Revenue [Line Items]
Net revenues	38,220	32,321	110,288	91,019
Technology Enabled Solutions | Health Plan Management
Disaggregation of Revenue [Line Items]
Net revenues	20,750	18,334	65,856	55,795
Technology Enabled Solutions | Consulting Services
Disaggregation of Revenue [Line Items]
Net revenues	1,671	1,969	4,153	3,604
Technology Enabled Solutions | Software Services
Disaggregation of Revenue [Line Items]
Net revenues	5,705	5,060	10,631	9,139
Technology Enabled Solutions | Data Analytics
Disaggregation of Revenue [Line Items]
Net revenues	2,902	2,372	9,268	7,293
Advisory Services
Disaggregation of Revenue [Line Items]
Net revenues	13,163	9,472	40,094	28,983
Advisory Services | Product Revenue
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	13,090	9,472	40,021	28,983
Advisory Services | Software Services
Disaggregation of Revenue [Line Items]
Net revenues	73	0	73	0
Advisory Services | Data Analytics
Disaggregation of Revenue [Line Items]
Net revenues	$ 0	$ 0	$ 0	$ 0