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Subsequent Events - Additional Information (Detail) - The Agreement [Member] - USD ($)
 12 Months Ended
Jul. 21, 2017
May 31, 2017
Subsequent Event [Line Items]    
Credit facility, interest rate description   Loan advances bear interest at either 50 basis points above Chase's floating prime rate ("CBFR") or 150 basis points in excess of the LIBOR rate for the applicable period (the "Adjusted LIBO Rate").
Credit facility, commitment fee description   (i) a commitment fee payable in arrears at a rate of .25% per annum on the average daily amount of the available revolving commitment under the New Facility during the prior calendar month; and (ii) monthly letter of credit fees payable in arrears at the applicable Adjusted LIBO Rate on the outstanding amount of letters of credit issued and outstanding during the prior month.
Subsequent Event [Member]    
Subsequent Event [Line Items]    
Credit facility, maximum borrowing capacity $ 10,000,000  
Credit facility, term 3 years  
Credit facility, closing fee paid $ 25,000  
Credit facility, commitment fee percentage 0.25%  
Credit facility, default status additional rate 2.00%  
Letter of Credit [Member] | Subsequent Event [Member]    
Subsequent Event [Line Items]    
Credit facility, maximum borrowing capacity $ 500,000  
Credit facility, outstanding $ 0  
Prime Rate [Member] | Subsequent Event [Member]    
Subsequent Event [Line Items]    
Credit facility, interest range 0.50%  
LIBOR [Member] | Subsequent Event [Member]    
Subsequent Event [Line Items]    
Credit facility, interest range 1.50%