Accounts Receivable and Significant Concentrations (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross accounts receivable	$ 8,758,345	$ 8,238,643
Less: allowances for doubtful accounts	101,947	107,618
Accounts receivable, net	8,656,398	8,131,025
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross accounts receivable	4,466,676	2,183,246
Government [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross accounts receivable	$ 4,291,669	$ 6,055,397