Operations - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Operations [Abstract]
Net loss	$ (7,305,954)	$ (6,095,788)	$ (19,784,100)	$ (11,407,519)