DESCRIPTION OF BUSINESS AND ACCOUNTING POLICIES - Estimated Useful Lives of Property and Equipment (Details)	12 Months Ended
	Dec. 31, 2021
Internally developed software
Property, Plant and Equipment [Line Items]
Useful life	2 years
Software implementation costs
Property, Plant and Equipment [Line Items]
Useful life	3 years
Computers
Property, Plant and Equipment [Line Items]
Useful life	2 years
Security systems
Property, Plant and Equipment [Line Items]
Useful life	1 year
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Useful life	5 years
Office equipment
Property, Plant and Equipment [Line Items]
Useful life	3 years