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Segment and Geographical Information (Tables)
6 Months Ended
Jun. 30, 2014
Segment and Geographical Information [Abstract]  
Summary of Operating Results by Segment
      Airport        
      Security        
      and Other        
      Aviation        
  Corporate   Services   Technology   Total
Six months ended June 30, 2014:                              
 Revenue $ -     $ 82,610     $ 396     $ 83,006  
 Depreciation and amortization   -       381       50       431  
 Loss (Profit) from continuing operations   1,325       (561 )     1,745       2,509  
Total assets   584       32,229       259       33,072  
                               
                               
Six months ended June 30, 2013:                              
 Revenue $ -     $ 56,036     $ 342     $ 56,378  
 Depreciation and amortization   1       326       41       368  
 Loss from continuing operations   705       1,472       1,594       3,771  
  Total assets   384       24,070       541       24,995  
Schedule of Revenues by Geographic Area
    Six months ended June 30,
    2014   2013
Netherlands   $ 34,285         $ 26,172  
Germany     21,883           3,330  
United States of America     19,555           19,494  
Other     7,284           7,382  
Total   $ 83,006         $ 56,378  
                     
Schedule of Property and Equipment by Geographic Area
    June 30,
    2014   2013
Netherlands   $ 532         $ 616  
Germany     239           27  
United States of America     433           490  
Other     339           413  
Total   $ 1,543         $ 1,492