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Commitments and Contingencies (Details) (USD $)
12 Months Ended
Sep. 28, 2013
Sep. 29, 2012
Sep. 24, 2011
Commitments and Contingencies      
Amounts charged to operations under operating leases $ 1,265,000 $ 1,350,000 $ 1,835,000
Minimum annual rental commitments under long-term operating leases      
2014 1,114,000    
2015 881,000    
2016 848,000    
2017 840,000    
2018 829,000    
Thereafter 1,507,000    
Letters of credit outstanding 2,180,000 2,180,000  
Commitments to purchase equipment $ 5,500,000