Fixed Assets (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Computer software, computer equipment and office equipment	3 years
Laboratory equipment, Useful Life	5 years
Furniture and fixtures, Useful Life	5 years
Leasehold improvements, Useful Life	5 years
Website development, Useful Life	3 years
Computer software, computer equipment and office equipment	$ 516,511	$ 516,511
Laboratory equipment	1,896,417	1,887,454
Furniture and fixtures	40,349	40,349
Leasehold improvements	309,618	309,618
Website development	374,453	298,553
Property, Plant and Equipment, Gross	3,137,348	3,052,485
Less — Accumulated depreciation and amortization	(2,626,156)	(2,408,585)
Total	$ 511,192	$ 643,900