Note 13 - Other Financial Data - Balance Sheet Information (Details) - USD ($) $ in Thousands	Jun. 27, 2020	Sep. 28, 2019
Accounts receivable	$ 55,204	$ 44,436
Less allowance for doubtful accounts	(303)	(254)
Total	54,901	44,182
Raw materials	32,399	27,667
Work in process	4,492	4,885
Finished goods	37,378	38,299
Total	74,269	70,851
Prepaid insurance	4,811	4,545
Income tax receivable	0	1,215
Other	1,434	1,610
Total	6,245	7,370
Cash surrender value of life insurance policies	10,149	10,211
Assets held for sale	7,971	0
Operating Lease, Right-of-Use Asset	1,838	0
Capitalized financing costs, net	188	237
Other	114	114
Total	20,260	10,562
Land and land improvements	14,507	14,548
Buildings	52,384	56,404
Machinery and equipment	173,394	165,609
Construction in progress	1,737	5,285
Property, plant and equipment, gross	242,022	241,846
Less accumulated depreciation	(140,933)	(136,886)
Total	101,089	104,960
Salaries, wages and related expenses	3,800	2,463
Customer rebates	1,272	1,381
Income taxes	1,258	0
Property taxes	1,122	1,820
Holdback for business acquired	1,000	0
Accrued expenses	942	0
State sales and use taxes	533	136
Workers' compensation	97	112
Sales allowance reserves	66	544
Other	1,749	362
Total	11,839	6,818
Deferred compensation	11,719	11,679
Deferred Tax Liabilities, Net, Noncurrent	7,292	6,900
Other liabilities	883	0
Total	$ 19,894	$ 18,579