Property And Equipment (Details) - USD ($)	Jun. 30, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Gross property and equipment	$ 11,010,615	$ 11,120,416
Less: Accumulated depreciation	(10,152,746)	(10,053,095)
Net property and equipment	857,869	1,067,321
Equipment [Member]
Property, Plant and Equipment [Line Items]
Gross property and equipment	8,386,835	8,496,636
Equipment Held For Lease [Member]
Property, Plant and Equipment [Line Items]
Gross property and equipment	303,412	303,412
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Gross property and equipment	$ 2,320,368	$ 2,320,368