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Segment Reporting and Geographic Information (Tables)
 12 Months Ended
Dec. 31, 2014
Segment Reporting [Abstract]  
Summary of Segmented Data

The following tables represent segmented data for the years ended December 31, 2014 and 2013:

 

    Energy & Security Sonar Solutions     GridSense     M2M     Other     Total  
Year ended December 31, 2014:                                        
Revenues from external customers   $ 11,200     $ 4,493     $ 2,174     $ 1,693     $ 19,560  
Intersegment revenues     —       —       —       —       —  
Segment gross profit     3,272       1,297       1,182       888       6,638  
Impairment of goodwill and intangibles     —       1,773       —       —       1,773  
Restructuring and related charges     —       198       76       20       294  
Depreciation and amortization     287       242       69       48       646  
Segment income (loss) before income taxes     (414 )     (4,831 )     (1,698 )     99       (6,844 )
Segment assets     12,118       3,680       1,663       797       18,258  
Expenditures for segment assets     278       6       —       44       328  
                                         
Year ended December 31, 2013:                                        
Revenues from external customers     11,815       5,026       1,671       1,776       20,288  
Intersegment revenues     —       —       —       —       —  
Segment gross profit     3,817       1,828       867       991       7,503  
Impairment of goodwill and intangibles     —       —       5,341       1,390       6,731  
Restructuring and related charges     —       594       —       —       594  
Depreciation and amortization     247       342       336       128       1,053  
Segment loss before income taxes     (243 )     (4,336 )     (9,492 )     (2,046 )     (16,117 )
Segment assets     11,219       6,400       2,300       870       20,789  
Expenditures for segment assets     333       14       750       295       1,392  
Reconciliation of Segment Data to Consolidated Statement of Operations

    Year ended
December 31,		  
    2013     2014  
Total net loss before income taxes for reportable segments   $ (14,071 )   $ (6,943 )
Other operational segment net income (loss) before income taxes     (2,046 )     99  
Segment loss before income taxes     (16,117 )     (6,844 )
Unallocated net income (cost) of DSIT headquarters     (53 )     109  
Unallocated net cost of corporate headquarters*     (5,016 )     (3,560 )
Consolidated net loss before taxes on income   $ (21,186 )   $ (10,295 )

  

* Includes $926 and $830 of stock compensation expense for the years ending December 31, 2013 and 2014, respectively.
Reconciliation of Segment Data to Consolidated Statement Balance Sheet

    As of December 31,  
    2013     2014  
Assets:                  
Total assets for reportable segments     $ 20,789     $ 18,258  
Assets of discontinued operations       8,081       143  
Unallocated assets of DSIT headquarters       5,519       5,897  
Unallocated assets of OmniMetrix headquarters       640       507  
Assets of corporate headquarters *       15,927       4,738  
Total consolidated assets     $ 50,956     $ 29,543  

 

* Includes $15,829 and $4,672 of unrestricted cash at December 31, 2013 and 2014, respectively.
Reconciliation of Segment Assets - Other Significant Items

     Segment
Totals  		     Adjustments     Consolidated Totals  
Other Significant Items                  
Year ended December 31, 2014                        
Depreciation and amortization   $ 646     $ 2     $ 648  
Expenditures for assets     328       65       393  
Year ended December 31, 2013                        
Depreciation and amortization   $ 1,053     $ 19     $ 1,072  
Expenditures for assets*     1,392       76       1,468  
Schedule of Revenue from External Customers by Geographical Areas

    Year ended  December 31,  
    2013     2014  
 Revenues based on location of customer:                  
 United States     $ 4,460     $ 5,279  
 Israel       8,164       7,155  
 Asia       5,908       4,406  
 Oceania       1,589       1,725  
 Other       167       995  
    $ 20,288     $ 19,560  
Schedule of Long Lived Assets

    December 31,  
    2013     2014  
Long-lived assets located in the following countries:                
United States   $ 564     $ 442  
Israel     582       638  
    $ 1,146     $ 1,080  
Revenues from Major Customers

Revenues from Major Customers

 

        Consolidated Revenues  
        2013     2014  
Customer   Segment   Revenues     % of Total Revenues      Revenues     % of Total Revenues    
A   Energy & Security Sonar Solutions   $ 2,336       12 %   $ 284       1 %
B   Energy & Security Sonar Solutions   $ 2,948       15 %   $ 1,940       10 %
C   Energy & Security Sonar Solutions   $ 1,077       5 %   $ 3,997       20 %
D   Energy & Security Sonar Solutions   $ 992       5 %   $ 1,848       9 %