Revenue from Contracts with Customers (Details 1) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue, net	$ 22,093,153	$ 17,544,338	$ 44,010,055	$ 37,623,957
U.S. Federal Government [Member]
Revenue, net	18,441,671	13,910,773	36,604,169	28,184,819
U.S. State and Local Governments [Member]
Revenue, net	126,342	112,526	242,181	219,528
Foreign Governments [Member]
Revenue, net	24,353	78,378	68,897	104,922
Commercial Enterprises [Member]
Revenue, net	$ 3,500,787	$ 3,442,661	$ 7,094,808	$ 9,114,688