Note 12 - Other Financial Data - Balance Sheet Information (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Oct. 01, 2022
Accounts receivable	$ 69,117	$ 82,043
Less allowance for doubtful accounts	(328)	(397)
Total	68,789	81,646
Raw materials	70,732	108,894
Work in process	8,711	8,817
Finished goods	91,742	79,943
Total	171,185	197,654
Prepaid insurance	3,139	4,563
Other	2,460	3,153
Total	5,599	7,716
Cash surrender value of life insurance policies	10,382	9,938
Capitalized financing costs, net	24	41
Other	142	121
Total	11,969	11,665
Land and land improvements	14,947	14,947
Buildings	55,306	55,044
Machinery and equipment	179,357	191,790
Construction in progress	19,248	11,745
Property, Plant and Equipment, Gross, Ending Balance	268,858	273,526
Less accumulated depreciation	(161,680)	(165,370)
Total	107,178	108,156
Customer rebates	3,516	2,760
Salaries, wages and related expenses	3,440	8,128
Income taxes	3,405	0
Property taxes	1,618	1,782
Sales allowance reserves	599	1,013
State sales and use taxes	175	595
Other	464	525
Total	14,112	15,800
Deferred compensation	11,931	11,747
Deferred Tax Liabilities, Net, Total	5,708	7,086
Total	18,169	19,405
Other Noncurrent Assets [Member]
Right-of-use asset	1,421	1,565
Accrued Expenses, Current [Member]
Operating lease liability	895	997
Other Noncurrent Liabilities [Member]
Operating lease liability	$ 530	$ 572