Property and Equipment (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 119,799	$ 125,391
Accumulated depreciation	3,127,091		$ 2,982,062
Capital Lease Obligations [Member]
Property, Plant and Equipment [Line Items]
Depreciation expense	3,700	$ 19,700
Capital Leased Assets, Gross	372,600		372,600
Accumulated depreciation	355,100		351,400
Capital lease assets, net	$ 17,500		$ 21,200