Annual report pursuant to Section 13 and 15(d)

2. Receivables (Details)

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2. Receivables (Details) (USD $)
Dec. 31, 2012
Dec. 31, 2011
Receivables Details    
Billed-federal government $ 664,533 $ 2,961,279
Billed-commercial and other 73,892 70,100
Total billed 738,425 3,031,379
Unbilled      
Allowance for doubtful accounts 381 141,721
Accounts receivable, net $ 738,044 $ 2,889,658