REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation of revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation of Revenue [Line Items]
Net revenues	$ 75,248	$ 61,562	$ 157,880	$ 126,305
Product Revenue
Disaggregation of Revenue [Line Items]
Net revenues	32,964	28,439	72,069	58,698
Health Plan Management
Disaggregation of Revenue [Line Items]
Net revenues	21,166	17,846	45,107	37,460
Consulting Services
Disaggregation of Revenue [Line Items]
Net revenues	15,327	10,301	29,414	21,147
Software Services
Disaggregation of Revenue [Line Items]
Net revenues	2,194	2,034	4,925	4,080
Data Analytics
Disaggregation of Revenue [Line Items]
Net revenues	3,597	2,942	6,365	4,920
Technology Enabled Solutions
Disaggregation of Revenue [Line Items]
Net revenues	61,366	52,103	130,949	106,794
Technology Enabled Solutions | Product Revenue
Disaggregation of Revenue [Line Items]
Net revenues	32,964	28,439	72,069	58,698
Technology Enabled Solutions | Health Plan Management
Disaggregation of Revenue [Line Items]
Net revenues	21,166	17,846	45,107	37,460
Technology Enabled Solutions | Consulting Services
Disaggregation of Revenue [Line Items]
Net revenues	1,445	842	2,483	1,636
Technology Enabled Solutions | Software Services
Disaggregation of Revenue [Line Items]
Net revenues	2,194	2,034	4,925	4,080
Technology Enabled Solutions | Data Analytics
Disaggregation of Revenue [Line Items]
Net revenues	3,597	2,942	6,365	4,920
Advisory Services
Disaggregation of Revenue [Line Items]
Net revenues	13,882	9,459	26,931	19,511
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	13,882	9,459	26,931	19,511
Advisory Services | Software Services
Disaggregation of Revenue [Line Items]
Net revenues	0	0	0	0
Advisory Services | Data Analytics
Disaggregation of Revenue [Line Items]
Net revenues	$ 0	$ 0	$ 0	$ 0