Note 6 - Fair Value Measurements - Fair Value of Financial Assets (Details) - Fair Value, Recurring [Member] - USD ($) $ in Thousands	Oct. 02, 2021	Oct. 03, 2020
Cash equivalents	$ 86,395	$ 72,234
Cash surrender value of life insurance policies	12,501	10,584
Total	98,896	82,818
Fair Value, Inputs, Level 1 [Member]
Cash equivalents	86,395	72,234
Cash surrender value of life insurance policies	0	0
Total	86,395	72,234
Fair Value, Inputs, Level 2 [Member]
Cash equivalents	0	0
Cash surrender value of life insurance policies	12,501	10,584
Total	$ 12,501	$ 10,584