SHARE INCENTIVE PLAN - Fair value of the options granted, assumptions used (Details)	12 Months Ended
Dec. 31, 2022 multiple $ / shares	Dec. 31, 2020 multiple $ / shares
Assumptions used
Expected volatility		40.00%
Exercise multiples \| multiple	2.2	2.2
Minimum
Assumptions used
Risk-free interest rate	1.88%	0.86%
Expected volatility	76.00%
Fair value of underlying ordinary share	$ 0.86	$ 2.38
Maximum
Assumptions used
Risk-free interest rate	2.93%	0.93%
Expected volatility	77.00%
Fair value of underlying ordinary share	$ 1.88	$ 2.7

Represents the exercise multiple assumption that is used in valuing an option on its own shares.

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- References

No definition available.

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over 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 (f)(2)(ii)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ 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 (f)(2)(iv)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

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