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Note Receivable and Line of Credit Issued - Additional Information (Detail)
6 Months Ended
Jan. 30, 2012
USD ($)
Aug. 01, 2015
USD ($)
Installment
Debt Disclosure [Abstract]    
Net sale price $ 1,000,000  
Promissory note interest rate 3.75%  
Interest commencement date   Jan. 30, 2013
Interest installments | Installment   16
Promissory note outstanding   $ 319,000
Revolving line of credit issued maximum   $ 600,000
Interest rate on outstanding credit balance   2.00%
Line of credit facility maturity date   Jan. 31, 2016
Extended revolving line of credit   $ 150,000