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Note F - Goodwill and Intangible Assets (Details Textual)
 12 Months Ended
Sep. 30, 2017
USD ($)
Sep. 24, 2016
USD ($)
Sep. 26, 2015
USD ($)
Number of Reportable Segments 3    
Impairment of Intangible Assets (Excluding Goodwill) $ 0 $ 0 $ 0
Amortization of Intangible Assets 3,840,000 5,078,000 5,370,000
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 3,500,000    
Finite-Lived Intangible Assets, Amortization Expense, Year Two 3,400,000    
Finite-Lived Intangible Assets, Amortization Expense, Year Three 3,000,000    
Finite-Lived Intangible Assets, Amortization Expense, Year Four 2,400,000    
Finite-Lived Intangible Assets, Amortization Expense, Year Five $ 2,300,000    
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 10 years 292 days    
Goodwill, Impairment Loss $ 0 0 0
Goodwill, Acquired During Period   0 0
Frozen Beverages [Member]      
Intangible Assets Acquired     $ 200,000
Frozen Beverages [Member] | ICEE Distributor [Member]      
Intangible Assets Acquired 6,957,000    
Goodwill, Acquired During Period 1,236,000    
Food Service [Member] | HEARTBAR [Member]      
Intangible Assets Acquired   $ 1,078,000  
Food Service [Member] | Hill & Valley Inc. [Member]      
Intangible Assets Acquired 15,760,000    
Goodwill, Acquired During Period 14,175,000    
Food Service [Member] | Labriola Baking Company [Member]      
Intangible Assets Acquired 576,000    
Goodwill, Acquired During Period $ 658,000    
Minimum [Member]      
Finite-Lived Intangible Asset, Useful Life 3 years    
Maximum [Member]      
Finite-Lived Intangible Asset, Useful Life 20 years