SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Property and equipment (Details)	12 Months Ended
Dec. 31, 2021
Leasehold improvements
Property and equipment
Useful life	10 years
Equipment \| Minimum
Property and equipment
Useful life	3 years
Equipment \| Maximum
Property and equipment
Useful life	10 years
Furniture, fixtures, fittings and other \| Minimum
Property and equipment
Useful life	2 years
Furniture, fixtures, fittings and other \| Maximum
Property and equipment
Useful life	10 years

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

No definition available.

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration