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Note 5 - Fair Value Measurements - Fair Value of Financial Assets (Details) - Fair Value, Recurring [Member] - USD ($)
$ in Thousands
Jun. 28, 2025
Sep. 28, 2024
Cash equivalents $ 53,368 $ 111,146
Cash surrender value of life insurance policies 13,183 12,610
Total 66,551 123,756
Fair Value, Inputs, Level 1 [Member]    
Cash equivalents 53,368 111,146
Cash surrender value of life insurance policies 0 0
Total 53,368 111,146
Fair Value, Inputs, Level 2 [Member]    
Cash equivalents 0 0
Cash surrender value of life insurance policies 13,183 12,610
Total $ 13,183 $ 12,610