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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
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents						$ 12,894us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_CashAndCashEquivalentsAxis = wbai_FixedRateInvestmentsMember	80,000us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_CashAndCashEquivalentsAxis = wbai_FixedRateInvestmentsMember	$ 4,835us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_CashAndCashEquivalentsAxis = wbai_AdjustableRateInvestmentsMember	30,000us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_CashAndCashEquivalentsAxis = wbai_AdjustableRateInvestmentsMember							80,000us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_CashAndCashEquivalentsAxis = wbai_FixedRateInvestmentsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member	30,000us-gaap_CashAndCashEquivalentsFairValueDisclosure / us-gaap_CashAndCashEquivalentsAxis = wbai_AdjustableRateInvestmentsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
Time deposits	67,031us-gaap_DepositsAssetsCurrent	415,903us-gaap_DepositsAssetsCurrent	121,085us-gaap_DepositsAssetsCurrent										415,903us-gaap_DepositsAssetsCurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member	121,085us-gaap_DepositsAssetsCurrent / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
Total fair value	84,760us-gaap_AssetsFairValueDisclosure	525,903us-gaap_AssetsFairValueDisclosure	121,085us-gaap_AssetsFairValueDisclosure										525,903us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member	121,085us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
Short-term investments				$ 11,311us-gaap_InvestmentsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_InvestmentTypeAxis = wbai_StructuredDepositMember	70,182us-gaap_InvestmentsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_InvestmentTypeAxis = wbai_StructuredDepositMember										70,182us-gaap_InvestmentsFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_InvestmentTypeAxis = wbai_StructuredDepositMember

X

- 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

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X

- 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

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X

- 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

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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

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