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Accounts Receivable and Unbilled Accounts Receivable (Schedule of Accounts Receivable) (Details) (USD $)
Mar. 31, 2014
Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Gross accounts receivable $ 5,217,614 $ 7,642,438
Less: allowances for doubtful accounts (29,814) (30,038)
Accounts receivable, net 5,187,800 7,612,400
Commercial [Member]
   
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Gross accounts receivable 2,338,522 2,782,179
Government [Member]
   
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Gross accounts receivable $ 2,879,092 $ 4,860,259