Subsequent Event - Additional Information (Detail) (USD $)	9 Months Ended			1 Months Ended
	Sep. 30, 2013	Apr. 26, 2013	Mar. 22, 2013	Oct. 31, 2013 Subsequent event	Oct. 02, 2013 Subsequent event
Subsequent Event [Line Items]
Proceeds from issuance of common stock				$ 4,900,000
Common stock shares issued				23,854,680
Common stock subscribed	4,940,000
Subscription receivable	4,940,000
Capital contribution made by company	5,000,000	1,850,000	3,150,000		3,500,000
Maximum capital contributions amount by company	$ 8,500,000