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SHARE-BASED COMPENSATION - Kaixin Auto Group 2018 Plan (Details) - shares			12 Months Ended
	Jul. 01, 2018	Mar. 15, 2018	Dec. 31, 2017	Dec. 31, 2019	May 31, 2018	Jan. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Ordinary shares available for future grant				4,200,000
Kaixin Auto Group 2018 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Ordinary shares available for future grant					21,868,000	6,248,000
Options granted	5,695,286	5,695,286
Kaixin Auto Group 2018 Plan | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of the options			P10Y

X

- Definition

Aggregate number of common shares reserved for future issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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

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- Definition

Description of terms of award under share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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