Unbilled Accounts Receivable and Significant Concentrations (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled accounts receivable	$ 8,131,448	$ 8,112,690
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled accounts receivable	258,773	278,862
Government [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unbilled accounts receivable	$ 7,872,675	$ 7,833,828