Property and Equipment (Details) - USD ($)	Mar. 31, 2016	Dec. 31, 2015
Property, equipment and depreciation and amortization
Property and equipment, gross	$ 5,755,929	$ 3,545,361
Less—accumulated depreciation and amortization	(1,010,148)	(854,782)
Property and equipment, net	4,745,781	2,690,579
Furniture and office equipment
Property, equipment and depreciation and amortization
Property and equipment, gross	1,509,546	1,483,227
Leasehold Improvements
Property, equipment and depreciation and amortization
Property and equipment, gross	1,952,180	39,401
Laboratory equipment
Property, equipment and depreciation and amortization
Property and equipment, gross	$ 2,294,203	$ 2,022,733