QUARTERLY FINANCIAL SUMMARY (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 27, 2024	Jun. 28, 2024	Mar. 29, 2024	Dec. 29, 2023	Sep. 29, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 30, 2022	Sep. 27, 2024	Sep. 29, 2023	Sep. 30, 2022
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net sales	$ 105,874	$ 172,472	$ 175,856	$ 138,644	$ 96,345	$ 187,047	$ 202,115	$ 178,337	$ 592,846	$ 663,844	$ 743,355
Gross profit	24,873	61,822	61,431	52,854	28,386	77,587	75,335	62,779	200,980	244,087	271,332
Operating profit (loss)	(42,809)	(506)	(253)	46	(22,565)	17,443	11,390	5,472	(43,522)	11,740	66,310
Income (loss) before income taxes	(39,680)	907	3,012	5,899	(22,112)	19,822	19,948	8,166	(29,862)	25,824	58,888
Income tax expense (benefit)	(5,414)	(715)	856	1,944	(6,105)	5,021	5,087	2,287	(3,329)	6,290	14,397
Net (loss) income	$ (34,266)	$ 1,622	$ 2,156	$ 3,955	$ (16,007)	$ 14,801	$ 14,861	$ 5,879	$ (26,533)	$ 19,534	$ 44,491
Class A
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income (loss) per common share - Basic (USD per share)	$ (3.35)	$ 0.16	$ 0.21	$ 0.39	$ (1.56)	$ 1.46	$ 1.47	$ 0.58	$ (2.60)	$ 1.93	$ 4.42
Net (loss) income per common share - Diluted (USD per share)	(3.35)	0.16	0.21	0.38	(1.56)	1.44	1.45	0.57	(2.60)	1.90	4.37
Class B
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income (loss) per common share - Basic (USD per share)	(3.35)	0.16	0.21	0.35	(1.56)	1.33	1.33	0.53	(2.60)	1.75	4.02
Net (loss) income per common share - Diluted (USD per share)	$ (3.35)	$ 0.16	$ 0.21	$ 0.38	$ (1.56)	$ 1.44	$ 1.45	$ 0.57	$ (2.60)	$ 1.90	$ 4.37