3. Summary of Significant Accounting Policies - Concentration of Receivables (Details)

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3. Summary of Significant Accounting Policies - Concentration of Receivables (Details)	Sep. 30, 2012	Dec. 31, 2011
Top Five Customers
Concentration of receivables	76.00%	89.00%
Federal Agencies
Concentration of receivables	30.00%	42.00%