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Acquisition - Summary of Purchase Price Allocation (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Mar. 21, 2015
Liabilities assumed:      
Goodwill $ 40,698us-gaap_Goodwill $ 5,226us-gaap_Goodwill  
Tiger Media [Member]      
Liabilities assumed:      
Goodwill 35,472us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= idi_TigerMediaMember
   
Tiger Media [Member] | The Best One Inc [Member]      
Assets acquired:      
Cash and bank     3,569us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
/ us-gaap_BusinessAcquisitionAxis
= idi_TigerMediaMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Accounts receivable     1,808us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
/ us-gaap_BusinessAcquisitionAxis
= idi_TigerMediaMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Other current assets     326us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther
/ us-gaap_BusinessAcquisitionAxis
= idi_TigerMediaMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Property and equipment, net     1,419us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
/ us-gaap_BusinessAcquisitionAxis
= idi_TigerMediaMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Intangible assets, net     4,280us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
/ us-gaap_BusinessAcquisitionAxis
= idi_TigerMediaMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Long-term deferred assets     586idi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredCostsNoncurrent
/ us-gaap_BusinessAcquisitionAxis
= idi_TigerMediaMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Total     11,988us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
/ us-gaap_BusinessAcquisitionAxis
= idi_TigerMediaMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Liabilities assumed:      
Accounts payable     (1,519)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable
/ us-gaap_BusinessAcquisitionAxis
= idi_TigerMediaMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Accrued expenses and other payables     (736)idi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccruedExpensesAndOtherLiabilities
/ us-gaap_BusinessAcquisitionAxis
= idi_TigerMediaMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Acquisition consideration payable     (464)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedContingentLiability
/ us-gaap_BusinessAcquisitionAxis
= idi_TigerMediaMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Amounts due to related parties     (124)idi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRelatedPartyPayable
/ us-gaap_BusinessAcquisitionAxis
= idi_TigerMediaMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Deferred revenue     (80)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeferredRevenue
/ us-gaap_BusinessAcquisitionAxis
= idi_TigerMediaMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Total     (2,923)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
/ us-gaap_BusinessAcquisitionAxis
= idi_TigerMediaMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Non-controlling interests     (425)us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue
/ us-gaap_BusinessAcquisitionAxis
= idi_TigerMediaMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Goodwill     35,472us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= idi_TigerMediaMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Total consideration     $ 44,112us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedLessNoncontrollingInterest
/ us-gaap_BusinessAcquisitionAxis
= idi_TigerMediaMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember