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Note E - Goodwill and Intangible Assets (Details Textual) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 28, 2024
Jun. 28, 2025
Sep. 30, 2023
Jun. 28, 2025
Sep. 27, 2025
Sep. 28, 2024
Sep. 30, 2023
Dec. 28, 2024
Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill)         $ 2,257 $ 0 $ 1,678  
Intangible Assets Acquired         0   0  
Amortization of Intangible Assets         $ 7,300 7,200 6,500  
Finite-Lived Intangible Asset, Expected Amortization, Year Two               $ 5,600
Finite-Lived Intangible Asset, Expected Amortization, Year Three               4,700
Finite-Lived Intangible Asset, Expected Amortization, Year Four               4,300
Finite-Lived Intangible Asset, Expected Amortization, Year Five               $ 4,200
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life         10 years      
Goodwill, Impairment Loss         $ 0 0 0  
Goodwill, Acquired During Period         $ 0 0    
Customer Relationships [Member]                
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life         10 years      
Technology-Based Intangible Assets [Member]                
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life         10 years      
License and Rights [Member]                
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life         20 years      
Franchise Rights [Member]                
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life         10 years      
Thinsters Cookie Business [Member]                
Intangible Assets Acquired           5,900    
Amortization of Intangible Assets $ 5,900              
Thinsters Cookie Business [Member] | Trade Names [Member]                
Amortization of Intangible Assets $ 5,300         $ 5,300    
Thinsters Cookie Business [Member] | Customer Relationships [Member]                
Finite-Lived Intangible Asset, Useful Life (Year) 10 years         10 years    
Amortization of Intangible Assets $ 700         $ 700    
Dippin’ Dots Holding, L.L.C. [Member]                
Goodwill, Acquired During Period             $ 700  
Trade Names [Member]                
Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill)   $ 1,500 $ 1,700 $ 800        
Trade Names [Member] | Food Service [Member]                
Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill)   $ 1,500 $ 1,700 $ 800        
Minimum [Member]                
Finite-Lived Intangible Asset, Useful Life (Year) 2 years       10 years 2 years    
Maximum [Member]                
Finite-Lived Intangible Asset, Useful Life (Year)         20 years