Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Accounting Policies [Abstract]

Property Plant And Equipment Useful life [Table Text Block]

The estimated useful lives of the assets are as follows:

	Estimated
	Useful Life
Land and building	20 years
Computer hardware and software	3 years
Furniture and fixtures	5 years
Mobile equipment	3 years

Sales Revenue, Goods, Net [Member]

Accounting Policies [Abstract]

Schedules Of Concentration Of Risk By Risk Factor [TableTextBlock]

Customers representing ten percent or more of annual consolidated revenues are set forth in the table below for the years ended:

	DECEMBER 31
	2012			2011
	As a % of			As a % of
Customer Name	Revenues			Revenues
Transportation Security Administration (“TSA”)		19	%		23	%
Department of Homeland Security (“DHS”)		15	%		27	%

Accounts Receivable [Member]

Accounting Policies [Abstract]

Schedules Of Concentration Of Risk By Risk Factor [TableTextBlock]

Customers representing ten percent or more of consolidated trade accounts receivable and unbilled receivables are set forth in the table below for the years ended:

	DECEMBER 31
	2012			2011
	As a % of			As a % of
Customer Name	Receivables			Receivables
Transportation Security Administration (“TSA”)		12	%		9	%
Department of Homeland Security (“DHS”)		19	%		34	%
Bureau of Alcohol Tabacco and Firearms ("ATF")		10	%		—