Summary of Significant Accounting Policies (Details 2) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Significant Accounting Policies [Line Items]
Property and equipment, Gross	$ 6,658,727	$ 4,411,115
Less accumulated depreciation	(5,584,017)	(3,823,159)
Property and equipment, net	1,074,710	587,956
Laboratory equipment [Member]
Significant Accounting Policies [Line Items]
Property and equipment, Gross	3,734,044	2,304,615
Office furniture and equipment [Member]
Significant Accounting Policies [Line Items]
Property and equipment, Gross	701,557	691,032
Computer equipment [Member]
Significant Accounting Policies [Line Items]
Property and equipment, Gross	1,563,177	1,169,910
Leasehold improvements [Member]
Significant Accounting Policies [Line Items]
Property and equipment, Gross	$ 659,949	$ 245,558