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Income Taxes - Additional Information (Detail) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Schedule Of Income Taxes [Line Items] |  |
Income tax benefit | $ (41,000)us-gaap_IncomeTaxExpenseBenefit | $ (33,000)us-gaap_IncomeTaxExpenseBenefit
Net operating loss carry forwards, last year of expiration period | 2019 |
Tiger Yaoyang [Member] |  |
Schedule Of Income Taxes [Line Items] |  |
Pretax loss incurred | 147,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = idi_TigerYaoyangMember | 148,000 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = idi_TigerYaoyangMember
Peoples' Republic of China [Member] |  |
Schedule Of Income Taxes [Line Items] |  |
Effective Income Tax Rate | 25.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations / us-gaap_StatementGeographicalAxis = country_CN | 25.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations / us-gaap_StatementGeographicalAxis = country_CN
Unrecognized Tax Benefits | $ 0 us-gaap_UnrecognizedTaxBenefits / us-gaap_StatementGeographicalAxis = country_CN | $ 0 us-gaap_UnrecognizedTaxBenefits / us-gaap_StatementGeographicalAxis = country_CN
HK [Member] |  |
Schedule Of Income Taxes [Line Items] |  |
Effective Income Tax Rate | 16.50%us-gaap_EffectiveIncomeTaxRateContinuingOperations / us-gaap_StatementGeographicalAxis = country_HK |
HK [Member] | Foreign Tax Authority [Member] |  |
Schedule Of Income Taxes [Line Items] |  |
Effective Income Tax Rate | 16.50%us-gaap_EffectiveIncomeTaxRateContinuingOperations / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember / us-gaap_StatementGeographicalAxis = country_HK |

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