Unbilled Accounts Receivable and Significant Concentrations (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Unbilled accounts receivable	$ 9,566,170	$ 8,131,448
Government [Member]
Unbilled accounts receivable	9,253,586	7,872,675
Commercial [Member]
Unbilled accounts receivable	$ 312,584	$ 258,773