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Summary of Significant Accounting Policies - Additional Information (Detail) | 3 Months Ended |  | 3 Months Ended |  | 3 Months Ended |  |  |  |
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Mar. 31, 2015 USD ($) Item | Dec. 31, 2014 USD ($) | Mar. 31, 2015 Data Solutions and Services [Member] | Mar. 31, 2015 Minimum [Member] | Mar. 31, 2015 Maximum [Member] | Mar. 31, 2015 Sales Revenue, Net [Member] Item | Mar. 31, 2015 Accounts Receivable [Member] Item | Mar. 31, 2015 Customer Concentration Risk [Member] Sales Revenue, Net [Member] Customer One [Member] | Mar. 31, 2015 Customer Concentration Risk [Member] Accounts Receivable [Member] Customer One [Member] | Mar. 31, 2015 Customer Concentration Risk [Member] Accounts Receivable [Member] Customer Two [Member] | Mar. 31, 2015 Customer Concentration Risk [Member] Accounts Receivable [Member] Customer Three [Member] | Mar. 31, 2015 Customer Concentration Risk [Member] Accounts Receivable [Member] Customer Four [Member] | Mar. 31, 2015 Supplier Concentration Risk [Member] Net Assets, Segment [Member] Item | Mar. 31, 2015 Supplier Concentration Risk [Member] Net Assets, Segment [Member] Supplier One [Member] | Mar. 31, 2015 Supplier Concentration Risk [Member] Net Assets, Segment [Member] Supplier two. | Mar. 31, 2015 Supplier Concentration Risk [Member] Net Assets, Segment [Member] Supplier three. | Mar. 31, 2015 Interactive Data [Member] USD ($) | Mar. 31, 2015 Tiger Media [Member] USD ($) | Mar. 31, 2015 Software and Website [Member] | Mar. 31, 2015 Lease Agreements [Member] | Mar. 31, 2015 Non-compete [Member] | Mar. 31, 2015 Customer Relationship [Member] | Mar. 31, 2015 China [Member] USD ($) | Dec. 31, 2014 China [Member] USD ($) | Mar. 31, 2015 United States and Hong Kong [Member] USD ($) | Dec. 31, 2014 United States and Hong Kong [Member] HKD
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net loss | $ (1,654,000)us-gaap_ProfitLoss | [1] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net cash used in operating activity | (2,129,000)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations | [1] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated deficit | (2,246,000)us-gaap_RetainedEarningsAccumulatedDeficit |  | (610,000)us-gaap_RetainedEarningsAccumulatedDeficit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and bank deposits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,870,000us-gaap_CashAndDueFromBanks / us-gaap_StatementGeographicalAxis = country_CN | 0us-gaap_CashAndDueFromBanks / us-gaap_StatementGeographicalAxis = country_CN | 4,426,000us-gaap_CashAndDueFromBanks / us-gaap_StatementGeographicalAxis = idi_UnitedStatesAndHongKongMember | 5,996,000us-gaap_CashAndDueFromBanks / us-gaap_StatementGeographicalAxis = idi_UnitedStatesAndHongKongMember
FDIC Insurance limit | 250,000us-gaap_CashFDICInsuredAmount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful life of intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 years | 6 years | 10 years | 10 years |  |  |  |
Goodwill | 40,698,000us-gaap_Goodwill |  | 5,226,000us-gaap_Goodwill |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,226,000us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = idi_InteractiveDataMember | 35,472,000us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = idi_TigerMediaMember |  |  |  |  |  |  |  |
Impairment loss on intangible assets | 0us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Advertising services revenue recognition period |  |  |  | 1 year | 3 days | 1 year |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Advertising and promotion costs | $ 35,000us-gaap_MarketingAndAdvertisingExpense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contributions to PRC employee | 21.00%us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employer contribution | 5.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Recognized income tax positions | 50.00%idi_IncomeTaxBenefitRealizationProbabilityPercentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Effective income tax rate | 0.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating segments | 2us-gaap_NumberOfOperatingSegments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Major customers |  |  |  |  |  |  | 1idi_NumberOfMajorCustomers / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember | 4idi_NumberOfMajorCustomers / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration risk |  |  |  |  |  |  |  |  | 32.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = idi_CustomerOneMember | 29.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = idi_CustomerOneMember | 18.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = idi_CustomerTwoMember | 16.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = idi_CustomerThreeMember | 13.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = idi_CustomerFourMember |  | 37.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_NetAssetsSegmentMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_SupplierConcentrationRiskMember / us-gaap_SupplyCommitmentAxis = idi_SupplierOneMember | 17.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_NetAssetsSegmentMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_SupplierConcentrationRiskMember / us-gaap_SupplyCommitmentAxis = idi_SupplierTwoMember | 10.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_NetAssetsSegmentMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_SupplierConcentrationRiskMember / us-gaap_SupplyCommitmentAxis = idi_SupplierThreeMember |  |  |  |  |  |  |  |  |  |
Number of major suppliers |  |  |  |  |  |  |  |  |  |  |  |  |  | 3idi_NumberOfMajorSuppliers / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_NetAssetsSegmentMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_SupplierConcentrationRiskMember |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | As IDI Holdings, LLC, the accounting acquirer of the merger consummated effective as of March 21, 2015, was incorporated on September 22, 2014, no comparative figures for the corresponding period in 2014 are presented.

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