Property And Equipment (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Gross property and equipment	$ 9,851,808	$ 9,888,037
Less: Accumulated depreciation	(9,389,595)	(9,295,349)
Net property and equipment	462,213	592,688
Equipment [Member]
Property, Plant and Equipment [Line Items]
Gross property and equipment	7,259,470	7,295,698
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Gross property and equipment	$ 2,592,338	$ 2,592,339