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Related-Party Transactions - Additional Information (Detail) (USD $)	0 Months Ended	12 Months Ended
	Feb. 18, 2011	Jan. 31, 2014
Related Party Transactions [Abstract]
Principal amount of promissory note	$ 250,000
Annual compound interest rate of promissory note	0.51%
Expiration date of promissory note which includes principal and accrued interest		Feb. 18, 2014

Carrying amount as of the balance sheet date of obligations due all related parties. For classified balance sheets, represents the current portion of such liabilities (due within one year or within the normal operating cycle if longer).

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