Note 13 - Other Financial Data - Balance Sheet Information (Details) - USD ($) $ in Thousands	Mar. 28, 2020	Sep. 28, 2019
Accounts receivable	$ 55,205	$ 44,436
Less allowance for doubtful accounts	(293)	(254)
Total	54,912	44,182
Raw materials	28,641	27,667
Work in process	4,406	4,885
Finished goods	38,638	38,299
Total	71,685	70,851
Prepaid insurance	4,162	4,545
Receivable related to post-closing purchase price adjustment for business acquired	3,113
Income tax receivable	755	1,215
Other	1,282	1,610
Total	9,312	7,370
Cash surrender value of life insurance policies	9,537	10,211
Operating Lease, Right-of-Use Asset	1,950
Assets held for sale	709
Capitalized financing costs, net	204	237
Other	114	114
Total	12,514	10,562
Land and land improvements	16,394	14,548
Buildings	57,815	56,404
Machinery and equipment	174,976	165,609
Construction in progress	1,211	5,285
Property, plant and equipment, gross	250,396	241,846
Less accumulated depreciation	(138,722)	(136,886)
Total	111,674	104,960
Salaries, wages and related expenses	3,350	2,463
Sales allowance reserves	1,193	544
Holdback for business acquired	1,000
Accrued expenses	919
Customer rebates	704	1,381
Property taxes	545	1,820
Workers' compensation	98	112
Other	1,878	498
Total	9,687	6,818
Deferred compensation	11,555	11,679
Deferred Income Tax Liabilities, Net, Total	7,505	6,900
Other liabilities	1,019
Total	$ 20,079	$ 18,579