Organization and Description of Business and Accounting Policies - Summary of Changes in Accumulated Other Comprehensive Income (Loss) - (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2026	Dec. 27, 2024	Dec. 29, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ 397,335	$ 385,954	$ 336,112
Other comprehensive income (loss)	573	(3,651)	(5,035)
Tax effect	(53)	733	766
Balance	344,184	397,335	385,954
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(3,530)	(2,297)	(1,547)
Other comprehensive income (loss)	22	(1,775)	(1,095)
Tax effect	(6)	542	345
Balance	(3,514)	(3,530)	(2,297)
Investments Available for Sale
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(11)	(37)	(336)
Other comprehensive income (loss)	13	31	363
Tax effect	(1)	(5)	(64)
Balance	1	(11)	(37)
Defined Benefit Pension Plan | JAPAN
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	67	56	184
Other comprehensive income (loss)	(20)	16	(182)
Tax effect	6	(5)	54
Balance	53	67	56
Defined Benefit Pension Plan | SWITZERLAND
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(3,557)	(1,835)	1,855
Other comprehensive income (loss)	558	(1,923)	(4,121)
Tax effect	(52)	201	431
Balance	(3,051)	(3,557)	(1,835)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(7,031)	(4,113)	156
Balance	$ (6,511)	$ (7,031)	$ (4,113)