Equipment - Summary of Equipment (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Less accumulated depreciation	$ (1,738,532)	$ (1,531,090)
Equipment, gross other than idle equipment	3,022,886	2,835,707
Equipment, net	178,168	2,835,707
Office and Laboratory Equipment [Member]
Property, Plant and Equipment [Line Items]
Equipment, gross	4,761,418	4,366,797
Idle Equipment [Member]
Property, Plant and Equipment [Line Items]
Equipment, gross	$ (2,844,718)