Note 17 - Other Financial Data - Balance Sheet Information (Details) - USD ($) $ in Thousands	Oct. 03, 2020	Sep. 28, 2019
Accounts receivable, net:
Accounts receivable	$ 54,108	$ 44,436
Less allowance for doubtful accounts	(291)	(254)
Total	53,817	44,182
Inventories:
Raw materials	31,553	27,667
Work in process	3,813	4,885
Finished goods	33,597	38,299
Total	68,963	70,851
Other current assets:
Prepaid insurance	4,096	4,545
Income taxes receivable	0	1,215
Other	1,474	1,610
Total	5,570	7,370
Other assets:
Cash surrender value of life insurance policies	10,584	10,211
Assets held for sale	7,778	0
Right-of-use assets	2,522	0
Capitalized financing costs, net	170	237
Other	106	114
Total	21,160	10,562
Property, plant and equipment, net:
Land and land improvements	14,520	14,548
Buildings	52,462	56,404
Machinery and equipment	172,617	165,609
Construction in progress	3,978	5,285
Property, plant and equipment, gross	243,577	241,846
Less accumulated depreciation	(142,185)	(136,886)
Total	101,392	104,960
Accrued expenses:
Salaries, wages and related expenses	4,971	2,463
Property taxes	1,726	1,820
Customer rebates	1,581	1,381
Income taxes	1,201	0
Holdback for business acquired	1,000	0
State sales and use taxes	544	136
Sales allowance reserves	0	544
Other	2,464	474
Total	14,717	6,818
Other liabilities:
Deferred compensation	11,553	11,679
Deferred Tax Liabilities, Net, Total	6,568	6,900
Total	19,421	18,579
Accrued Expenses, Current [Member]
Accrued expenses:
Operating lease liabilities	1,230	0
Other Noncurrent Liabilities [Member]
Other liabilities:
Operating lease liabilities	$ 1,300	$ 0