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Segment - Information Regarding Data Fusion Operations, Advertising Business and Assets for Operating Segments and Unallocated Corporate Operations as well as Geographic Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2015
Dec. 31, 2014
Segment Reporting Information [Line Items]      
Revenue [1] $ 994 $ 2,252  
Operating loss [1] (3,716) (5,279)  
Assets 13,397 13,397 $ 13,213
United States [Member]      
Segment Reporting Information [Line Items]      
Revenue 994 2,252  
China and Others [Member]      
Segment Reporting Information [Line Items]      
Revenue 162 171  
Corporate, Non-Segment [Member]      
Segment Reporting Information [Line Items]      
Operating loss 1,623 1,751  
Assets 2,171 2,171  
Data Fusion Segment [Member] | Operating Segments [Member]      
Segment Reporting Information [Line Items]      
Revenue 994 2,252  
Operating loss 2,093 3,528  
Assets 10,634 10,634  
Advertising Business Segment [Member]      
Segment Reporting Information [Line Items]      
Revenue 162 171  
Operating loss 1,171 1,257  
Assets 592 592  
Loss on disposal of business $ 41,471 $ 41,471  
[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 periods in 2014 are presented.