Note 15 - Other Financial Data - Balance Sheet Information (Details) - USD ($) $ in Thousands	Sep. 29, 2018	Sep. 30, 2017
Accounts receivable, net:
Accounts receivable	$ 51,779	$ 40,485
Less allowance for doubtful accounts	(295)	(201)
Total	51,484	40,284
Inventories:
Raw materials	61,008	51,808
Work in process	4,779	2,637
Finished goods	28,370	27,408
Total	94,157	81,853
Other current assets:
Prepaid insurance	3,845	3,796
Income taxes receivable		925
Other	2,050	1,228
Total	5,895	5,949
Other assets:
Cash surrender value of life insurance policies	9,769	9,026
Capitalized financing costs, net	40	105
Other	104	203
Total	9,913	9,334
Property, plant and equipment, net:
Land and land improvements	14,438	12,177
Buildings	54,684	50,373
Machinery and equipment	160,068	153,484
Construction in progress	9,672	5,641
Property, plant and equipment, gross	238,862	221,675
Less accumulated depreciation	(132,714)	(123,005)
Total	106,148	98,670
Accrued expenses:
Salaries, wages and related expenses	6,775	5,520
Property taxes	1,585	1,384
Customer rebates	1,531	1,015
Sales allowance reserves	804	21
Income taxes	469
Workers' compensation	113	116
Other	652	611
Total	11,929	8,667
Other liabilities:
Deferred compensation	10,541	9,276
Deferred Tax Liabilities, Net, Noncurrent	5,340	8,103
Total	$ 15,881	$ 17,379