Operations - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Operations [Abstract]
Net income (loss)	$ (8,482,215)	$ (10,949,911)	$ (5,813,546)	$ (12,478,144)