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Note 12 - Changes to the Components of Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 27, 2021
Mar. 28, 2020
Mar. 27, 2021
Mar. 28, 2020
Balance $ 808,289 $ 842,520 $ 809,498 $ 833,751
Other comprehensive income (loss) before reclassifications (531) (3,921) 1,748 (3,111)
Balance 813,000 833,068 813,000 833,068
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]        
Balance (13,308) (12,178)    
Other comprehensive income (loss) before reclassifications   (3,921)    
Balance (13,839) (16,099) (13,839) (16,099)
AOCI Attributable to Parent [Member]        
Balance (13,308) (12,178) (15,587) (12,988)
Other comprehensive income (loss) before reclassifications   (3,921)   (3,111)
Balance $ (13,839) $ (16,099) $ (13,839) $ (16,099)