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Accounts Receivable and Unbilled Accounts Receivable (Schedule of Accounts Receivable) (Details) (USD $) | Sep. 30, 2013 | Dec. 31, 2012
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross accounts receivable | $ 6,980,596 | $ 7,009,252
Less: allowances for doubtful accounts | (30,043) | (76,886)
Accounts receivable, net | 6,950,553 | 6,932,366
Commercial [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross accounts receivable | 2,173,014 | 2,546,268
Government [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross accounts receivable | $ 4,807,582 | $ 4,462,984

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