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SHARE-BASED COMPENSATION - Kaixin Auto 2019 Plan - fair value of share options granted (Details) - Kaixin Auto 2019 Plan - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing stock price	$ 3.73
Weighted-average grant-date fair value of the share options granted		$ 3.21
Aggregate grant date fair value of options		$ 7,794,799
Unrecognized share-based compensation expense	$ 1,961
Unrecognized share-based compensation expense, expected recognition period	1 year 2 months 26 days

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- Definition

The grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of cost to be recognized for option under share-based payment arrangement.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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

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