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FAIR VALUE MEASUREMENT (Details) In Thousands, unless otherwise specified | Dec. 31, 2014 USD ($) | Dec. 31, 2014 CNY | Dec. 31, 2013 CNY | Dec. 31, 2014 Structured Deposit [Member] Recurring [Member] USD ($) | Dec. 31, 2014 Structured Deposit [Member] Recurring [Member] CNY | Dec. 31, 2014 Fixed-rate investments [Member] USD ($) | Dec. 31, 2014 Fixed-rate investments [Member] CNY | Dec. 31, 2014 Adjustable-rate investments [Member] USD ($) | Dec. 31, 2014 Adjustable-rate investments [Member] CNY | Dec. 31, 2014 Quoted prices in active markets for identical assets (Level 1) [Member] CNY | Dec. 31, 2013 Quoted prices in active markets for identical assets (Level 1) [Member] CNY | Dec. 31, 2014 Quoted prices in active markets for identical assets (Level 1) [Member] Structured Deposit [Member] Recurring [Member] CNY | Dec. 31, 2014 Significant other observable inputs (Level 2) [Member] CNY | Dec. 31, 2013 Significant other observable inputs (Level 2) [Member] CNY | Dec. 31, 2014 Significant other observable inputs (Level 2) [Member] Structured Deposit [Member] Recurring [Member] CNY | Dec. 31, 2014 Significant other observable inputs (Level 2) [Member] Fixed-rate investments [Member] CNY | Dec. 31, 2014 Significant other observable inputs (Level 2) [Member] Adjustable-rate investments [Member] CNY | Dec. 31, 2014 Significant unobservable inputs (Level 3) [Member] CNY | Dec. 31, 2013 Significant unobservable inputs (Level 3) [Member] CNY | Dec. 31, 2014 Significant unobservable inputs (Level 3) [Member] Structured Deposit [Member] Recurring [Member] CNY
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Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents |  |  |  |  |  | $ 12,894 us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_CashAndCashEquivalentsAxis = wbai_FixedRateInvestmentsMember | 80,000 us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_CashAndCashEquivalentsAxis = wbai_FixedRateInvestmentsMember | $ 4,835 us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_CashAndCashEquivalentsAxis = wbai_AdjustableRateInvestmentsMember | 30,000 us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_CashAndCashEquivalentsAxis = wbai_AdjustableRateInvestmentsMember |  |  |  |  |  |  | 80,000 us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_CashAndCashEquivalentsAxis = wbai_FixedRateInvestmentsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member | 30,000 us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_CashAndCashEquivalentsAxis = wbai_AdjustableRateInvestmentsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |  |  |
Time deposits | 67,031 us-gaap_DepositsAssetsCurrent | 415,903 us-gaap_DepositsAssetsCurrent | 121,085 us-gaap_DepositsAssetsCurrent |  |  |  |  |  |  |  |  |  | 415,903 us-gaap_DepositsAssetsCurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member | 121,085 us-gaap_DepositsAssetsCurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |  |  |  |  |  |
Total fair value | 84,760 us-gaap_AssetsFairValueDisclosure | 525,903 us-gaap_AssetsFairValueDisclosure | 121,085 us-gaap_AssetsFairValueDisclosure |  |  |  |  |  |  |  |  |  | 525,903 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member | 121,085 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member |  |  |  |  |  |
Short-term investments |  |  |  | $ 11,311 us-gaap_InvestmentsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_InvestmentTypeAxis = wbai_StructuredDepositMember | 70,182 us-gaap_InvestmentsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_InvestmentTypeAxis = wbai_StructuredDepositMember |  |  |  |  |  |  |  |  |  | 70,182 us-gaap_InvestmentsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_InvestmentTypeAxis = wbai_StructuredDepositMember |  |  |  |  |

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 + Details
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- Definition Carrying value of amounts transferred to third parties for security purposes that are expected to be returned or applied towards payment within one year or during the operating cycle, if shorter. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 17 -Article 5 + Details
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- Definition Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Available-for-Sale Securities -URI http://asc.fasb.org/extlink&oid=6505594 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Trading Securities -URI http://asc.fasb.org/extlink&oid=6526789 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Subparagraph a, f, g -Article 7 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 35 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=27723805&loc=d3e24584-111560 + Details
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