Summary of Pro Forma Consolidated Results of Operations (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Pro forma revenue	$ 89,296,180	$ 81,245,811
Pro forma operating expenses	75,793,091	82,290,199
Pro forma net loss attributable to the Company	$ (8,382,100)	$ (23,987,490)
Pro forma net loss per common share, basic and diluted	$ (0.16)	$ (0.52)
Weighted average number of common shares outstanding, basic and diluted	52,055,652	46,374,544