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SHARE-BASED COMPENSATION - Kaixin Auto 2019 Plan (Details)	May 03, 2019 employee $ / shares shares	Dec. 31, 2022 $ / shares	Dec. 31, 2021 $ / shares	Apr. 30, 2019 shares
SHARE-BASED COMPENSATION
Weighted average exercise price | $ / shares		$ 0.02	$ 0.02
Kaixin 2019 Plan
SHARE-BASED COMPENSATION
Ordinary shares of KAH for future grant				4,715,700
Options granted	2,186,364
Number of employees for option | employee	144
Kaixin 2019 Plan | Vests immediately on grant date
SHARE-BASED COMPENSATION
Weighted average exercise price | $ / shares	$ 1.70
Vesting percentage	25.00%
Kaixin 2019 Plan | Vests monthly subsequent to replacement date
SHARE-BASED COMPENSATION
Weighted average exercise price | $ / shares	$ 0.01
Vesting period	3 years
Vesting percentage	62.50%
Kaixin 2019 Plan | Restricted shares
SHARE-BASED COMPENSATION
Granted	2,183,828
Kaixin 2019 Plan | Replacement restricted shares | Shares granted to certain employees
SHARE-BASED COMPENSATION
Granted	205,215
Kaixin 2019 Plan | Replacement restricted shares were subject to graded vesting
SHARE-BASED COMPENSATION
Vesting percentage	0.25%
Kaixin 2019 Plan | Replacement restricted shares were subject to graded vesting | Vests monthly subsequent to replacement date
SHARE-BASED COMPENSATION
Granted	917,738
Kaixin 2019 Plan | Restricted shares were subject to graded vesting
SHARE-BASED COMPENSATION
Vesting period	3 years
Kaixin 2019 Plan | Restricted shares were subject to graded vesting | Vests immediately on grant date
SHARE-BASED COMPENSATION
Vesting percentage	62.50%
Kaixin 2019 Plan | Restricted shares were subject to graded vesting | Vests monthly subsequent to replacement date
SHARE-BASED COMPENSATION
Vesting percentage	0.0278%

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Aggregate number of common shares reserved for future issuance.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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