REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue [Line Items]
Revenue	$ 36,213	$ 38,380	$ 110,909	$ 118,317
Revenue recognized when services are performed or assets are sold
Disaggregation of Revenue [Line Items]
Revenue	31,487	33,779	96,222	104,480
Revenue related to technology platforms and professional services
Disaggregation of Revenue [Line Items]
Revenue	2,687	2,644	8,289	7,679
Reimbursable expenses revenue
Disaggregation of Revenue [Line Items]
Revenue	2,039	1,957	6,398	6,158
Servicer and Real Estate | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	28,702	30,866	87,495	91,349
Servicer and Real Estate | Revenue recognized when services are performed or assets are sold | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	24,223	26,387	73,314	77,947
Servicer and Real Estate | Revenue related to technology platforms and professional services | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	2,677	2,633	8,265	7,654
Servicer and Real Estate | Reimbursable expenses revenue | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	1,802	1,846	5,916	5,748
Origination | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	7,511	7,514	23,414	26,968
Origination | Revenue recognized when services are performed or assets are sold | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	7,264	7,392	22,908	26,533
Origination | Revenue related to technology platforms and professional services | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	10	11	24	25
Origination | Reimbursable expenses revenue | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 237	$ 111	$ 482	$ 410