Note 12 - Other Financial Data - Balance Sheet Information (Details) - USD ($) $ in Thousands	Dec. 28, 2019	Sep. 28, 2019
Accounts receivable, net:
Accounts receivable	$ 35,603	$ 44,436
Less allowance for doubtful accounts	(198)	(254)
Total	35,405	44,182
Inventories:
Raw materials	22,143	27,667
Work in process	4,366	4,885
Finished goods	38,743	38,299
Total	65,252	70,851
Other current assets:
Prepaid insurance	3,950	4,545
Income tax receivable	1,252	1,215
Other	1,268	1,610
Total	6,470	7,370
Other assets:
Cash surrender value of life insurance policies	10,592	10,211
Operating Lease, Right-of-Use Asset	1,988
Capitalized financing costs, net	221	237
Other	114	114
Total	12,915	10,562
Property, plant and equipment, net:
Land and land improvements	14,628	14,548
Buildings	56,579	56,404
Machinery and equipment	166,176	165,609
Construction in progress	4,864	5,285
Property, plant and equipment, gross	242,247	241,846
Less accumulated depreciation	(139,582)	(136,886)
Total	102,665	104,960
Accrued expenses:
Salaries, wages and related expenses	2,176	2,463
Customer rebates	1,881	1,381
Property taxes	1,680	1,820
Operating lease liability	934
Dividends	578
Sales allowance reserves	551	544
Workers' compensation	105	112
Other	458	498
Total	8,363	6,818
Other liabilities:
Deferred compensation	11,857	11,679
Deferred Tax Liabilities, Net, Noncurrent	7,086	6,900
Operating lease liability	1,046
Total	$ 19,989	$ 18,579