Subsequent Events (Details Narrative) - USD ($)	May 31, 2019	Apr. 30, 2019	Apr. 25, 2019	Oct. 25, 2017	Jul. 11, 2017
Number of ordinary shares issued				$ 6,038	$ 25,000
Subsequent Event [Member] | Kaixin Auto Group [Member] | 2019 Equity Incentive Plan [Member]
Number of ordinary shares issued	$ 2,206,888
Subsequent Event [Member] | Kaixin Auto Group [Member] | 2019 Equity Incentive Plan [Member] | Restricted Shares [Member]
Number of ordinary shares issued	$ 2,407,733
Subsequent Event [Member] | Early Bird Capital [Member]
Cash paid for fees		$ 200,000
Amount note payable issued for fees		$ 1,500,000
Subsequent Event [Member] | Convertible Loan Agreement [Member] | Kaixin And 58 Com Holdings Inc [Member] | Kaixin Auto Group [Member]
Proceeds from loans			$ 1,000,000
Conversion price (in dollars per share)			$ 10.00
Subsequent Event [Member] | Exchange Agreement [Member] | Kaixin Auto Group [Member]
Description of exchange share		In exchange for approximately 28.3 million ordinary shares of KAH, or one KAH share for approximately 4.85 outstanding shares of Kaixin.
Percentage owned securities		100.00%
Number of earnout shares to be issued and held in escrow		19,500,000
Description of seller earnout shares		(1) if the Company’s gross revenue for the year ended December 31, 2019 is greater than or equal to RMB 5,000,000,000, the Seller is entitled to receive 1,950,000 ordinary shares of KAH; (2) if the Company’s adjusted EBITDA for the year ended December 31, 2019 is greater than or equal to RMB 150,000,000, the Seller is entitled to receive 3,900,000 ordinary shares of KAH, increasing proportionally to 7,800,000 ordinary shares if Company’s adjusted EBITDA is greater than or equal to RMB 200,000,000; and (3) if the Company’s adjusted EBITDA for the year ended December 31, 2020 is greater than or equal to RMB 340,000,000, the Seller is entitled to receive 4,875,000 ordinary shares of KAH, increasing proportionally to 9,750,000 ordinary shares if the Company’s adjusted EBITDA is greater than or equal to RMB 480,000,000.
Number of share redeemed		20,403,667
Subsequent Event [Member] | Exchange Agreement [Member] | Kaixin Auto Group [Member] | Equity Incentive Plan [Member]
Number of share reserved for issuance		4,700,000
Redemption price (in dollars per share)		$ 10.37
Subsequent Event [Member] | Waiver Agreement [Member] | Kaixin And Renren [Member]
Description certain rights for SVF's commitment		(i) to contribute $1.6 million to KAH within two weeks after the closing of the Merger, (ii) to set a limit on the liabilities to be paid by cash (up to US$4.0 million) and noncash (up to US$2.6 million) consideration by KAH and (iii) to within one month use its best efforts to restructure the loans it has extended to KAH.