QUARTERLY FINANCIAL SUMMARY (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 03, 2025	Jun. 27, 2025	Mar. 28, 2025	Dec. 27, 2024	Sep. 27, 2024	Jun. 28, 2024	Mar. 29, 2024	Dec. 29, 2023	Oct. 03, 2025	Sep. 27, 2024	Sep. 29, 2023
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net sales	$ 135,762	$ 180,655	$ 168,349	$ 107,649	$ 105,874	$ 172,472	$ 175,856	$ 138,644	$ 592,415	$ 592,846	$ 663,844
Gross profit	49,117	67,927	58,866	32,183	24,873	61,822	61,431	52,854	208,093	200,980	244,087
Operating profit (loss)	(8,183)	7,330	4,901	(20,239)	(42,809)	(506)	(253)	46	(16,191)	(43,522)	11,740
Income (loss) before income taxes	(5,010)	10,500	4,158	(18,927)	(39,680)	907	3,012	5,899	(9,279)	(29,862)	25,824
Income tax expense (benefit)	24,040	2,758	1,854	(3,637)	(5,414)	(715)	856	1,944	25,015	(3,329)	6,290
Net (loss) income	$ (29,050)	$ 7,742	$ 2,304	$ (15,290)	$ (34,266)	$ 1,622	$ 2,156	$ 3,955	$ (34,294)	$ (26,533)	$ 19,534
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)	$ (2.83)	$ 0.75	$ 0.22	$ (1.49)	$ (3.35)	$ 0.16	$ 0.21	$ 0.39	$ (3.35)	$ (2.60)	$ 1.93
Net (loss) income per common share - Diluted (USD per share)	(2.83)	0.75	0.22	(1.49)	(3.35)	0.16	0.21	0.38	(3.35)	(2.60)	1.90
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)	(2.83)	0.72	0.22	(1.49)	(3.35)	0.16	0.21	0.35	(3.35)	(2.60)	1.75
Net (loss) income per common share - Diluted (USD per share)	$ (2.83)	$ 0.75	$ 0.22	$ (1.49)	$ (3.35)	$ 0.16	$ 0.21	$ 0.38	$ (3.35)	$ (2.60)	$ 1.90