Note 4 - Fair Value Measurements - Fair Value of Financial Assets (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Mar. 30, 2019	Sep. 29, 2018
Cash surrender value of life insurance policies	$ 10,076	$ 9,769
Total	10,076	54,026
Cash equivalents		44,257
Fair Value, Inputs, Level 1 [Member]
Cash surrender value of life insurance policies
Total		44,257
Cash equivalents		44,257
Fair Value, Inputs, Level 2 [Member]
Cash surrender value of life insurance policies	10,076	9,769
Total	$ 10,076	9,769
Cash equivalents