Revenue from Contracts with Customers (Details 1) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue, net	$ 21,294,360	$ 18,463,872	$ 58,918,317	$ 55,956,617
U.S. Federal Government [Member]
Revenue, net	16,947,681	14,379,567	45,132,500	43,098,730
U.S. State and Local Governments [Member]
Revenue, net	112,273	134,904	331,801	293,216
Foreign Governments [Member]
Revenue, net	28,933	48,563	133,855	145,015
Commercial Enterprises [Member]
Revenue, net	$ 4,205,473	$ 3,900,838	$ 13,320,161	$ 12,419,656