Note 13 - Other Financial Data - Balance Sheet Information (Details) - USD ($) $ in Thousands	Jul. 03, 2021	Oct. 03, 2020
Accounts receivable	$ 59,666	$ 54,108
Less allowance for doubtful accounts	(317)	(291)
Total	59,349	53,817
Raw materials	46,319	31,553
Work in process	5,389	3,813
Finished goods	19,450	33,597
Total	71,158	68,963
Prepaid insurance	4,846	4,096
Other	2,633	1,474
Total	7,479	5,570
Cash surrender value of life insurance policies	12,401	10,584
Disposal Group, Including Discontinued Operation, Assets, Total	6,306	7,778
Other assets	1,788	2,522
Capitalized financing costs, net	122	170
Other	145	106
Total	20,762	21,160
Land and land improvements	14,554	14,520
Buildings	53,059	52,462
Machinery and equipment	178,793	172,617
Construction in progress	8,876	3,978
Property, plant and equipment, gross	255,282	243,577
Less accumulated depreciation	(149,553)	(142,185)
Total	105,729	101,392
Salaries, wages and related expenses	7,618	4,971
Income taxes	2,486	1,201
Customer rebates	1,695	1,581
Property taxes	1,142	1,726
Operating lease liability	1,059	1,230
State sales and use taxes	483	544
Holdback for business acquired	0	1,000
Other	929	2,464
Total	15,412	14,717
Deferred compensation	12,040	11,553
Deferred Tax Liabilities, Net, Total	6,532	6,568
Operating lease liability	734	1,300
Total	$ 19,306	$ 19,421