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Note 3 (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Mar. 27, 2021
Mar. 28, 2020
Mar. 27, 2021
Mar. 28, 2020
Depreciation, Total $ 11,984,000 $ 12,923,000 $ 24,253,000 $ 24,810,000
Minimum [Member]        
Finite-Lived Intangible Asset, Useful Life (Year)     2 years  
Maximum [Member]        
Finite-Lived Intangible Asset, Useful Life (Year)     20 years