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Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	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	147,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / dei_LegalEntityAxis = idi_TigerYaoyangMember	148,000us-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	$ 0us-gaap_UnrecognizedTaxBenefits / us-gaap_StatementGeographicalAxis = country_CN	$ 0us-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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Net operating loss carryforwards expiration ending year.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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-Name Accounting Standards Codification

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