Disaggregation of Revenues, Geographic Sales and Product Sales - Net Sales by Geographic Areas (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 27, 2024	Dec. 29, 2023	Dec. 30, 2022
Geographic And Sales [Line Items]
Total net sales		$ 313,901	$ 322,415	$ 284,391
Geographic Distribution, Domestic [Member]
Geographic And Sales [Line Items]
Total net sales		19,896	17,221	14,679
Geographic Distribution, Foreign [Member]
Geographic And Sales [Line Items]
Total net sales		294,005	305,194	269,712
Geographic Distribution, Foreign [Member] | China [Member]
Geographic And Sales [Line Items]
Total net sales	[1]	161,321	185,554	148,167
Geographic Distribution, Foreign [Member] | JAPAN
Geographic And Sales [Line Items]
Total net sales		41,836	38,472	43,093
Geographic Distribution, Foreign [Member] | Other
Geographic And Sales [Line Items]
Total net sales	[2]	$ 90,848	$ 81,168	$ 78,452

[1] The China region includes sales into China and Hong Kong.

[2] No other location individually exceeds 10% of the total net sales.