Property and Equipment (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Summary of accounting policies
Property and equipment, gross	$ 2,286,155	$ 2,214,896
Less: accumulated depreciation and amortization	(1,868,340)	(1,686,420)
Property and equipment, net	417,815	528,476
Depreciation and amortization expense	187,993	125,956
Laboratory equipment
Summary of accounting policies
Property and equipment, gross	1,543,289	1,536,432
Computers and software
Summary of accounting policies
Property and equipment, gross	358,485	315,640
Furniture, office equipment and leasehold improvements
Summary of accounting policies
Property and equipment, gross	259,367	237,810
Office equipment under capital leases
Summary of accounting policies
Property and equipment, gross	$ 125,014	$ 125,014