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Significant Accounting Policies (Schedule of Major Customers, by Percentage of Accounts Receivable) (Details) (Trade accounts receivable [Member], Customer Concentration Risk [Member])
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Transportation Security Administration ("TSA") [Member]
   
Concentration Risk [Line Items]    
As a % of Receivables 19.00% 12.00%
Department of Homeland Security ("DHS") [Member]
   
Concentration Risk [Line Items]    
As a % of Receivables 8.00% 19.00%
Bureau of Alcohol Tabacco and Firearms ("ATF") [Member]
   
Concentration Risk [Line Items]    
As a % of Receivables 7.00% 10.00%
U.S. Airforce ("USAF") [Member]
   
Concentration Risk [Line Items]    
As a % of Receivables 14.00% 0.00%