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Stock-Based Compensation - Additional Information (Detail) - USD ($)
12 Months Ended
May. 28, 2012
Jul. 01, 2011
Sep. 30, 2015
Mar. 17, 2009
2009 Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Common stock options issued to employees     0  
Remaining contractual life on the options outstanding     6 years  
Number of options, forfeited or cancelled     0  
1997 Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares available for granting     0  
Remaining contractual life on the options outstanding     1 year  
July 1, 2011 Common Stock Options Issued [Member] | 2009 Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Common stock options issued to employees   298,000    
Options vesting rate   25.00%    
Options vesting period     Options vest at 25% per year starting on October 1, 2012 and each year thereafter through October 1, 2015  
Options exercisable     Oct. 01, 2021  
Estimated fair value of options at time of grant   $ 941,000    
May 28, 2012 Common Stock Options Issued [Member] | 2009 Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Common stock options issued to employees 20,000      
Options vesting rate 25.00%      
Options vesting period     Options vest at 25% per year starting on May 28, 2013 and each year thereafter through May 28, 2016  
Options exercisable     Oct. 01, 2021  
Estimated fair value of options at time of grant $ 63,000      
Compensation expense remaining to be expensed     $ 11,000  
Common Stock [Member] | 2009 Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Maximum number of shares granting of awards       800,000
Shares available for granting     482,000  
Common Stock [Member] | 1997 Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Incentive and nonqualified stock options, Number of shares authorized to purchase     1,200,000  
Percentage of common stock to be purchased of authorized common stock of any subsidiary     15.00%  
Options expiration period after date of grant     10 years  
Class B Stock [Member] | 2009 Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Maximum number of shares granting of awards       160,000
Shares available for granting     160,000  
Class B Stock [Member] | 1997 Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Incentive and nonqualified stock options, Number of shares authorized to purchase     1,200,000