CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 27, 2025	Jun. 28, 2024	Jun. 27, 2025	Jun. 28, 2024
Net sales	$ 180,655	$ 172,472	$ 456,653	$ 486,972
Cost of sales	112,728	110,650	297,677	310,865
Gross profit	67,927	61,822	158,976	176,107
Operating expenses:
Marketing and selling	37,553	41,109	102,581	111,040
Administrative management, finance and information systems	15,423	13,935	41,134	42,302
Research and development	7,621	7,284	23,269	23,478
Total operating expenses	60,597	62,328	166,984	176,820
Operating profit (loss)	7,330	(506)	(8,008)	(713)
Interest income	(927)	(1,123)	(2,585)	(3,178)
Interest expense	49	37	164	115
Other (income) expense, net	(2,292)	(327)	(1,318)	(7,468)
Profit (loss) before income taxes	10,500	907	(4,269)	9,818
Income tax expense (benefit)	2,758	(715)	975	2,085
Net income (loss)	$ 7,742	$ 1,622	$ (5,244)	$ 7,733
Weighted average common shares - Basic:
Participating securities (in shares)	19	17	20	17
Weighted average common shares - Dilutive (in shares)	10,293	10,249	10,280	10,232
Class A
Weighted average common shares - Basic:
Weighted average common shares - basic (in shares)	9,066	9,024	9,052	9,007
Net income (loss) per common share - Basic:
Net income (loss) per common share - basic (in USD per share)	$ 0.75	$ 0.16	$ (0.52)	$ 0.75
Net income (loss) per common share - Diluted:
Net income (loss) per common share - diluted (in USD per share)	$ 0.75	$ 0.16	$ (0.52)	$ 0.75
Class B
Weighted average common shares - Basic:
Weighted average common shares - basic (in shares)	1,208	1,208	1,208	1,208
Net income (loss) per common share - Basic:
Net income (loss) per common share - basic (in USD per share)	$ 0.72	$ 0.16	$ (0.52)	$ 0.75
Net income (loss) per common share - Diluted:
Net income (loss) per common share - diluted (in USD per share)	$ 0.75	$ 0.16	$ (0.52)	$ 0.75