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Segment - Information Regarding Operations and Assets for Operating Segments and Unallocated Corporate Operations as well as Geographic Information (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Segment Reporting Information [Line Items]    
Revenue $ 1,268us-gaap_SalesRevenueNet [1]  
Operating loss 1,659us-gaap_OperatingIncomeLoss [1]  
Revenue 1,268us-gaap_SalesRevenueNet [1]  
Assets 59,005us-gaap_Assets 13,213us-gaap_Assets
Goodwill 40,698us-gaap_Goodwill 5,226us-gaap_Goodwill
Data Fusion [Member]    
Segment Reporting Information [Line Items]    
Revenue 1,258us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= idi_DataFusionSegmentMember
 
Operating loss 1,435us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= idi_DataFusionSegmentMember
 
Revenue 1,258us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= idi_DataFusionSegmentMember
 
Assets 11,732us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= idi_DataFusionSegmentMember
 
Goodwill 5,226us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= idi_DataFusionSegmentMember
 
Advertising Services [Member]    
Segment Reporting Information [Line Items]    
Revenue 10us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= idi_AdvertisingServicesSegmentMember
 
Operating loss 86us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= idi_AdvertisingServicesSegmentMember
 
Revenue 10us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= idi_AdvertisingServicesSegmentMember
 
Assets 38,909us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= idi_AdvertisingServicesSegmentMember
 
Goodwill 35,472us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= idi_AdvertisingServicesSegmentMember
 
Corporate [Member]    
Segment Reporting Information [Line Items]    
Operating loss 138us-gaap_OperatingIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
 
Assets 8,364us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember
 
US [Member]    
Segment Reporting Information [Line Items]    
Revenue 1,258us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= country_US
 
Revenue 1,258us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= country_US
 
China [Member]    
Segment Reporting Information [Line Items]    
Revenue 10us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= country_CN
 
Revenue $ 10us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= country_CN
 
[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.