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Principal Activities and Organization - Additional Information (Detail)	12 Months Ended	0 Months Ended		12 Months Ended
	Dec. 31, 2014 Subsidiaries	Nov. 30, 2012	Dec. 31, 2010	Dec. 31, 2011	Dec. 31, 2010 Subsidiaries
Organization And Principal Business [Line Items]
Effective date of merger	Mar. 21, 2015
Establishment date of subsidiary	Dec. 11, 2014
Merger agreement date	Dec. 14, 2014
Number of subsidiaries	3idi_NumberOfSubsidiaries
Shanghai Tiger Shangda [Member]
Organization And Principal Business [Line Items]
Equity interests		100.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = idi_ShanghaiTigerShangdaMember
Zhejiang Continental [Member]
Organization And Principal Business [Line Items]
Equity interests			100.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = idi_ZhejiangContinentalAdvertisingCompanyLimitedMember
HK Ad-Icon [Member]
Organization And Principal Business [Line Items]
Equity interests				100.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = idi_AdIconCompanyLimitedMember
Jingli [Member]
Organization And Principal Business [Line Items]
Number of subsidiaries				5idi_NumberOfSubsidiaries / dei_LegalEntityAxis = idi_ShanghaiJingliAdvertisingCompanyLimitedMember	5idi_NumberOfSubsidiaries / dei_LegalEntityAxis = idi_ShanghaiJingliAdvertisingCompanyLimitedMember
Best One Inc [Member]
Organization And Principal Business [Line Items]
Equity interests	100.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = idi_BestOneIncMember

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Number of subsidiaries.

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Date the subsidiary of the limited liability company (LLC) or limited partnership (LP) was formed, in CCYY-MM-DD format.

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