Accounts Receivable and Unbilled Accounts Receivables (Details 2)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Transportation Security Administration [Member]
As a % of Revenues	19.00%	27.00%	18.00%	25.00%
Department Of Homeland Security [Member]
As a % of Revenues	17.00%	28.00%	17.00%	28.00%
Maryland Procurement [Member]
As a % of Revenues	11.00%	0.00%	8.00%	0.00%