Property and Equipment (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 488,584	$ 496,908	$ 395,358
Accumulated depreciation	2,982,062	3,025,628
Disposal Of Property And Equipment [Member]
Property, Plant and Equipment [Line Items]
Accumulated depreciation	168,400
Depreciated Equipment Historical Cost, Gross	446,200
Capital Lease Obligations [Member]
Property, Plant and Equipment [Line Items]
Depreciation expense	25,900	72,100	$ 58,700
Capital Leased Assets, Gross	372,600	548,000
Accumulated depreciation	351,400	481,000
Capital lease assets, net	$ 21,200	$ 67,000