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ORGANIZATION (Schedule of Variable Interest Entity) (Details) | 12 Months Ended
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Dec. 31, 2014
BVI [Member] |  |
Variable Interest Entity And Subsidiaries [Line Items] |  |
Date of establishment | Feb. 09, 2011 |
Place of establishment | British Virgin Islands |
Percentage of ownership by the Company | 100.00%wbai_VariableInterestEntityAndSubsidiariesOwnershipPercentage / dei_LegalEntityAxis = wbai_FineBrandLimitedMember |
Principal activities | Investment Holding |
500wan HK [Member] |  |
Variable Interest Entity And Subsidiaries [Line Items] |  |
Date of establishment | Mar. 08, 2011 |
Place of establishment | Hong Kong |
Percentage of ownership by the Company | 100.00%wbai_SubsidiariesOwnershipPercentage / dei_LegalEntityAxis = wbai_FiveHundredWanHkLimitedMember |
Principal activities | Investment Holding |
500.com USA [Member] |  |
Variable Interest Entity And Subsidiaries [Line Items] |  |
Date of establishment | Jul. 21, 2014 |
Place of establishment | USA |
Percentage of ownership by the Company | 100.00%wbai_SubsidiariesOwnershipPercentage / dei_LegalEntityAxis = wbai_FiveHundredUsaCorporationMember |
Principal activities | Investment Holding |
E-Sun Sky Computer [Member] |  |
Variable Interest Entity And Subsidiaries [Line Items] |  |
Date of establishment | Jun. 18, 2007 |
Place of establishment | PRC |
Percentage of ownership by the Company | 100.00%wbai_SubsidiariesOwnershipPercentage / dei_LegalEntityAxis = wbai_EsunSkyComputerShenzhenCoLtdMember |
Principal activities | Software Service |
E-Sun Network [Member] | Variable Interest Entity, Primary Beneficiary [Member] |  |
Variable Interest Entity And Subsidiaries [Line Items] |  |
Date of establishment | Dec. 07, 1999 |
Place of establishment | PRC |
Percentage of ownership by the Company |  |
Principal activities | Online Lottery Service |
Youlanguang Technology [Member] | Variable Interest Entity, Primary Beneficiary [Member] |  |
Variable Interest Entity And Subsidiaries [Line Items] |  |
Date of establishment | Dec. 16, 2008 |
Place of establishment | PRC |
Percentage of ownership by the Company |  |
Principal activities | Online Lottery Service |
Guangtiandi Technology [Member] | Variable Interest Entity, Primary Beneficiary [Member] |  |
Variable Interest Entity And Subsidiaries [Line Items] |  |
Date of establishment | Dec. 16, 2008 |
Place of establishment | PRC |
Percentage of ownership by the Company |  |
Principal activities | Online Lottery Service |
E-Sun Sky Network [Member] | Variable Interest Entity, Primary Beneficiary [Member] |  |
Variable Interest Entity And Subsidiaries [Line Items] |  |
Date of establishment | May 22, 2006 | [1]
Place of establishment | PRC | [1]
Percentage of ownership by the Company |  | [1]
Principal activities | Online Lottery Service | [1]
500Fu [Member] | Variable Interest Entity, Primary Beneficiary [Member] |  |
Variable Interest Entity And Subsidiaries [Line Items] |  |
Date of establishment | Apr. 23, 2014 | [2]
Place of establishment | PRC | [2]
Percentage of ownership by the Company |  | [2]
Principal activities | Third party payment service | [2]
Lhasa Yicai [Member] | Variable Interest Entity, Primary Beneficiary [Member] |  |
Variable Interest Entity And Subsidiaries [Line Items] |  |
Date of establishment | Oct. 17, 2014 | [2]
Place of establishment | PRC | [2]
Percentage of ownership by the Company |  | [2]
Principal activities | Online Lottery Service | [2]
Baifengrun Technology [Member] | Variable Interest Entity, Primary Beneficiary [Member] |  |
Variable Interest Entity And Subsidiaries [Line Items] |  |
Date of establishment | Jun. 13, 2014 | [3]
Place of establishment | PRC | [3]
Percentage of ownership by the Company |  | [3]
Principal activities | Development, operation of mobile phone games | [3]
[1] | A subsidiary of E-Sun Network
[2] | A subsidiary of E-Sun Sky Network
[3] | A subsidiary of Guangtiandi Technology

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