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Secured Revolving Credit Facility - Additional Information (Detail) - USD ($)
3 Months Ended 9 Months Ended
Mar. 01, 2017
Mar. 20, 2015
Feb. 28, 2017
Feb. 28, 2017
Line of Credit Facility [Line Items]        
Expected yearly net loss related to covenants     $ 1,750,000  
Expected yearly net worth related to covenants     $ 23,383,000  
Subsequent Event [Member]        
Line of Credit Facility [Line Items]        
Accommodation fee paid to First Business Capital $ 50,000      
Secured Revolving Credit Facility [Member]        
Line of Credit Facility [Line Items]        
Maximum borrowing capacity   $ 10,000,000    
Credit facility, interest rate   3.75%    
Interest rate description       Loan advances bear interest at 3.75% in excess of The Wall Street Journal's published one year LIBOR rate
Secured revolving credit facility term   3 years    
Secured revolving credit facility renewal term   1 year