Quarterly report pursuant to Section 13 or 15(d)

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%