Related Party Transaction - Additional Information (Detail) (USD $)	9 Months Ended
	Sep. 30, 2013 NonEmployee
Subsequent Event [Line Items]
Payment for consulting services	$ 48,000
Number of non employee to whom consulting services paid	1
Non Employee [Member]
Subsequent Event [Line Items]
Payment for consulting services to another non-employee	75,000
Third Non Employee [Member]
Subsequent Event [Line Items]
Payment for consulting services to another non-employee	$ 75,000