SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Property and Equipment, net (Details)	3 Months Ended
	Mar. 31, 2022
Computer Equipment, Office Equipment and Software
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Furniture, Fixtures and Equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Furniture, Fixtures and Equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	7 years
Motor Vehicles
Property, Plant and Equipment [Line Items]
Estimated useful life	4 years
Software Development
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years