RELATED PARTY BALANCES AND TRANSACTIONS - Transactions with related parties (Parenthetical) (Details)	Dec. 31, 2021
Xiaomi Corporation and its affiliates \| Convertible Bonds
RELATED PARTY BALANCES AND TRANSACTIONS
Effective interest rate	5.40%

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant