REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Revenue	$ 35,235	$ 40,421	$ 74,696	$ 79,937
Revenue recognized when services are performed or assets are sold
Disaggregation of Revenue [Line Items]
Revenue	30,800	35,283	64,735	70,701
Revenue related to technology platforms and professional services
Disaggregation of Revenue [Line Items]
Revenue	2,386	2,529	5,602	5,035
Reimbursable expenses revenue
Disaggregation of Revenue [Line Items]
Revenue	2,049	2,609	4,359	4,201
Servicer and Real Estate | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	26,848	31,947	58,793	60,483
Servicer and Real Estate | Revenue recognized when services are performed or assets are sold | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	22,538	26,901	49,091	51,560
Servicer and Real Estate | Revenue related to technology platforms and professional services | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	2,380	2,523	5,588	5,021
Servicer and Real Estate | Reimbursable expenses revenue | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	1,930	2,523	4,114	3,902
Origination | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	8,387	8,474	15,903	19,454
Origination | Revenue recognized when services are performed or assets are sold | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	8,262	8,382	15,644	19,141
Origination | Revenue related to technology platforms and professional services | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	6	6	14	14
Origination | Reimbursable expenses revenue | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 119	$ 86	$ 245	$ 299