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SHARE-BASED PAYMENT - Schedule Non-vested Shares Activity (Details)	12 Months Ended
	Dec. 31, 2022 $ / shares shares
Number of Shares
Number of non-vested shares, grant (in shares) | shares	2,900,000
Weighted Average Grant Date Fair Value (US$)
Weighted average grant date fair value per share, non-vested shares, grant (in dollars per share)	$ 4.81
Weighted average grant date fair value per share, non-vested shares, forfeited (in dollars per share)	$ 4.87
Capped Non-vested Shares Units
Number of Shares
Number of non-vested shares, outstanding at beginning balance (in shares) | shares	23,027,399
Number of non-vested shares, vested (in shares) | shares	(9,582,930)
Number of non-vested shares, outstanding at ending balance (in shares) | shares	13,444,469
Weighted Average Grant Date Fair Value (US$)
Weighted average grant date fair value per share, non-vested shares, outstanding at beginning (in dollars per share)	$ 8.74
Weighted average grant date fair value per share, non-vested shares, vested (in dollars per share)	4.37
Weighted average grant date fair value per share, non-vested shares, outstanding at ending (in dollars per share)	$ 2.38
Restricted Stock Units (RSUs)
Number of Shares
Number of non-vested shares, outstanding at beginning balance (in shares) | shares	671,441
Number of non-vested shares, grant (in shares) | shares	1,239,854
Number of non-vested shares, vested (in shares) | shares	(110,940)
Number of non-vested shares, forfeited (in shares) | shares	(577,518)
Number of non-vested shares, outstanding at ending balance (in shares) | shares	1,222,837
Weighted Average Grant Date Fair Value (US$)
Weighted average grant date fair value per share, non-vested shares, outstanding at beginning (in dollars per share)	$ 9.08
Weighted average grant date fair value per share, non-vested shares, grant (in dollars per share)	4.93
Weighted average grant date fair value per share, non-vested shares, vested (in dollars per share)	6.26
Weighted average grant date fair value per share, non-vested shares, forfeited (in dollars per share)	5.30
Weighted average grant date fair value per share, non-vested shares, outstanding at ending (in dollars per share)	$ 6.92

X

- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(ii)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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X

- Definition

Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(ii)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(02)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

Gross number of share options (or share units) granted during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(01)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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- Definition

Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(01)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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Number of non-vested options forfeited.

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Weighted average grant-date fair value of non-vested options forfeited.

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Number of options vested.

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