Property And Equipment (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Gross property and equipment	$ 11,120,416	$ 10,896,597
Less: Accumulated depreciation	(10,053,095)	(10,001,869)
Net property and equipment	1,067,321	894,728
Equipment [Member]
Property, Plant and Equipment [Line Items]
Gross property and equipment	8,496,636	8,264,804
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	$ 2,328,381