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Significant Accounting Policies (Details 1)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Department Of Homeland Security [Member]    
Concentration Risk [Line Items]    
As a % of Receivables 47.00% 51.00%
US Airforce [Member]    
Concentration Risk [Line Items]    
As a % of Receivables 0.00% 14.00%