Changes in Carrying Amount of Goodwill (Detail) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill gross amount, beginning balance, gross		$ 1,154,528
Goodwill carrying value, reverse acquisition		20,847,608
Goodwill gross amount, ending balance, gross	22,002,136	22,002,136
Goodwill accumulated impairment, beginning balance
Goodwill accumulated impairment, impairment charge	(20,847,608)	(20,847,608)
Goodwill accumulated impairment, ending balance	(20,847,608)	(20,847,608)
Goodwill net carrying value, beginning balance		1,154,528
Goodwill carrying value, reverse acquisition		20,847,608
Goodwill accumulated impairment, impairment charge	(20,847,608)	(20,847,608)
Goodwill net carrying value, ending balance	$ 1,154,528	$ 1,154,528