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Disaggregation of Sales, Geographic Sales and Product Sales - Net Sales by Geographic Areas (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 26, 2025	Sep. 27, 2024	Sep. 26, 2025	Sep. 27, 2024
Geographic And Sales [Line Items]
Total net sales		$ 94,732	$ 88,590	$ 181,641	$ 264,951
Geographic Distribution, Domestic [Member]
Geographic And Sales [Line Items]
Total net sales		5,632	4,681	16,726	15,015
Geographic Distribution, Foreign [Member]
Geographic And Sales [Line Items]
Total net sales		89,100	83,909	164,915	249,936
Geographic Distribution, Foreign [Member] | China [Member]
Geographic And Sales [Line Items]
Total net sales		55,833	52,468	60,255	154,464
Geographic Distribution, Foreign [Member] | JAPAN
Geographic And Sales [Line Items]
Total net sales		11,226	10,534	33,536	30,878
Geographic Distribution, Foreign [Member] | Other [Member]
Geographic And Sales [Line Items]
Total net sales	[1]	$ 22,041	$ 20,907	$ 71,124	$ 64,594
[1] No other location individually exceeds 10% of the total sales.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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