Organization and Business Operations (Details Narrative) - USD ($)								12 Months Ended
	Jan. 24, 2019	Nov. 02, 2018	May 23, 2018	Nov. 03, 2017	Oct. 30, 2017	Oct. 25, 2017	Jul. 11, 2017	Dec. 31, 2018	Dec. 31, 2017	Jan. 25, 2019	Dec. 31, 2016
Proceeds from issuance of private placement									$ 5,277,260
Cash								39,643	165,405
Proceeds from sale of ordinary shares to initial shareholders									202,235,670
Proceeds and repayments of sponsor loan								663,009
Proceeds from issuance of non-convertible promissory note			$ 500,000
Investment held in trust account, fair value								210,470,644	206,715,209
Business combination, contingent consideration arrangements, description		If Kaixin’s revenue equals or exceeds RMB5.0 billion in 2019 (USD 725.7 million), Renren will receive 1.95 million shares. If Kaixin’s 2019 Adjusted Earnings Before Interest, Taxes, Depreciation, and Amortization (“EBITDA”) equals RMB150 million (USD 21.8 million), Renren will receive 3.9 million shares, increasing proportionally to 7.8 million shares if 2019 Adjusted EBITDA equals or exceeds RMB200 million (USD 29.0 million). If Kaixin’s 2020 Adjusted EBITDA equals RMB340 million (USD 49.3 million), Renren will receive 4.875 million shares, increasing proportionally to 9.75 million shares if 2020 Adjusted EBITDA equals or exceeds RMB480 million (USD 69.7 million). Notwithstanding the Revenue and Adjusted EBITDA achieved by the post-transaction company for any period, Kaixin shareholders will receive the 2019 earnout shares if the Company’s stock price is higher than $13.00 for any sixty days in any period of ninety consecutive trading days during a fifteen month period following the closing, and will receive the 2019 earnout shares and the 2020 earnout shares if the Company’s stock price is higher than $13.50 for any sixty days in any period of ninety consecutive trading days during a thirty month period following the closing.
Number of shares issue						862,500	4,312,500
Proceeds from sale of ordinary shares to initial shareholders									$ 31,038
Kaixin Auto Group [Member]
Deposited in trust account										$ 1,050,000
Sponsor Or Its Designees And Kaixin [Member]
Deposited in trust account										$ 2,063,629
Public share (in dollars per share)										$ 0.1
Sponsor [Member]
Deposited in trust account										$ 1,013,629
Subsequent Event [Member]
Proceeds from issuance of non-convertible promissory note	$ 1,100,000
Share Exchange Agreement [Member]
Additions in tangible assets								$ 5,000,000
Share Exchange Agreement [Member] | Kaixin Auto Group [Member]
Capital shares reserved for future issuance		19,500,000
Consideration shares		28,300,000
Number of shares issue		4,700,000
Initial Public Offering [Member]
Number of shares issued in transaction					18,000,000
Units (in dollars per share)					$ 10.00			$ 0.10
Proceeds from sale of ordinary shares to initial shareholders					$ 18,000,000
Investment held in trust account, fair value								$ 2,063,629
Initial Public Offering [Member] | Underwriter [Member]
Number of shares issued in transaction					900,000
Units (in dollars per share)					$ 10.00
Proceeds from sale of ordinary shares to initial shareholders					$ 9,000,000
Initial Public Offering [Member] | Trust Account [Member]
Description of redemption settlement terms								The Company will provide its shareholders with the opportunity to redeem all or a portion of their shares included in the Public Units sold in the Initial Public Offering (the “Public Shares”) upon the completion of a Business Combination either (i) in connection with a shareholder meeting called to approve the Business Combination or (ii) by means of a tender offer. The decision as to whether the Company will seek shareholder approval of a Business Combination or conduct a tender offer will be made by the Company, solely in its discretion. The shareholders will be entitled to redeem their shares for a pro rata portion of the amount then on deposit in the Trust Account (initially approximately $10.00 per share, plus any pro rata interest earned on the funds held in the Trust Account and not previously released to the Company to pay its tax obligations).
Costs of liquidating								$ 18,500
Private Placement Warrants [Member]
Number of shares issued in transaction				52,726
Units (in dollars per share)				$ 10.00
Proceeds from issuance of private placement				$ 527,260
Private Placement Warrants [Member] | Sponsor [Member]
Number of shares issued in transaction					475,000
Units (in dollars per share)					$ 10.00
Proceeds from issuance of private placement					$ 4,750,000
Private Placement Warrants [Member] | Sponsor [Member] | Underwriting Agreement [Member]
Units (in dollars per share)								$ 10.00
Private Placement Warrants [Member] | Underwriter [Member] | Underwriting Agreement [Member]
Number of shares issued in transaction								54,000
Units (in dollars per share)								$ 10.00
Over-Allotment Option [Member] | Underwriter [Member]
Number of shares issued in transaction				2,636,293
Units (in dollars per share)				$ 10.00
Additional proceeds from offering				$ 26,362,930
Proceeds from sale of ordinary shares to initial shareholders				$ 26,362,930
Over-Allotment Option [Member] | Underwriter [Member] | Underwriting Agreement [Member]
Number of shares issued in transaction								2,700,000	2,700,000