SEGMENTS OF BUSINESS (Schedule Of Operations By Geographic Area) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2022	Jul. 01, 2022	Apr. 01, 2022	Dec. 31, 2021	Oct. 01, 2021	Jul. 02, 2021	Apr. 02, 2021	Jan. 01, 2021	Sep. 30, 2022	Oct. 01, 2021	Oct. 02, 2020
Segment Reporting Information [Line Items]
Net sales:	$ 196,389	$ 203,819	$ 189,623	$ 153,524	$ 166,260	$ 213,568	$ 206,156	$ 165,667	$ 743,355	$ 751,651	$ 594,209
Total assets:	679,931				674,287				679,931	674,287
Long-term assets:	188,204				169,894				188,204	169,894
United States:
Segment Reporting Information [Line Items]
Total assets:	581,004				574,916				581,004	574,916
Long-term assets:	177,191				158,868				177,191	158,868
Europe:
Segment Reporting Information [Line Items]
Total assets:	40,040				45,916				40,040	45,916
Long-term assets:	6,363				8,038				6,363	8,038
Canada and other
Segment Reporting Information [Line Items]
Total assets:	58,887				53,455				58,887	53,455
Long-term assets:	$ 4,650				$ 2,988				4,650	2,988
Operating Segment | United States:
Segment Reporting Information [Line Items]
Net sales:									649,867	659,330	525,204
Operating Segment | Europe:
Segment Reporting Information [Line Items]
Net sales:									34,427	30,509	28,880
Operating Segment | Canada:
Segment Reporting Information [Line Items]
Net sales:									44,635	48,867	29,512
Operating Segment | Other:
Segment Reporting Information [Line Items]
Net sales:									14,425	12,945	10,613
Interunit transfers
Segment Reporting Information [Line Items]
Net sales:									(46,337)	(40,685)	(26,109)
Interunit transfers | United States:
Segment Reporting Information [Line Items]
Net sales:									34,212	30,593	17,503
Interunit transfers | Europe:
Segment Reporting Information [Line Items]
Net sales:									12,109	9,974	8,561
Interunit transfers | Canada:
Segment Reporting Information [Line Items]
Net sales:									0	12	35
Interunit transfers | Other:
Segment Reporting Information [Line Items]
Net sales:									$ 17	$ 106	$ 10