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Note 6 - Fair Value Measurements - Fair Value of Financial Assets (Details) - Fair Value, Recurring [Member] - USD ($)
$ in Thousands
Sep. 28, 2024
Sep. 30, 2023
Cash equivalents $ 111,146 $ 125,805
Cash surrender value of life insurance policies 12,610 10,586
Total 123,756 136,391
Fair Value, Inputs, Level 1 [Member]    
Cash equivalents 111,146 125,805
Cash surrender value of life insurance policies 0 0
Total 111,146 125,805
Fair Value, Inputs, Level 2 [Member]    
Cash equivalents 0 0
Cash surrender value of life insurance policies 12,610 10,586
Total $ 12,610 $ 10,586