Accounts Receivable and Unbilled Accounts Receivable (Schedule of Accounts Receivable) (Details) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross accounts receivable	$ 5,259,853	$ 7,009,252
Less: allowances for doubtful accounts	(30,527)	(76,886)
Accounts receivable, net	5,229,326	6,932,366
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross accounts receivable	2,321,127	2,546,268
Government [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross accounts receivable	$ 2,938,726	$ 4,462,984