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Business Segments - Schedule of Revenue Information by Product (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 27, 2025	Sep. 28, 2024	Sep. 27, 2025	Sep. 28, 2024
Entity Wide Information Revenue From External Customer [Line Items]
Total revenues		$ 12,484	$ 11,581	$ 37,951	$ 35,973
Cyclo G6
Entity Wide Information Revenue From External Customer [Line Items]
Total revenues		3,537	3,127	10,012	9,416
Retina
Entity Wide Information Revenue From External Customer [Line Items]
Total revenues		6,698	6,450	21,390	20,519
Other
Entity Wide Information Revenue From External Customer [Line Items]
Total revenues	[1]	$ 2,249	$ 2,004	$ 6,549	$ 6,038
[1] (1) Includes service contract revenues of $0.4 million and $47 thousand, and $1.0 million and $0.4 million recognized during the three and nine months ended September 27, 2025 and September 28, 2024, respectively. Includes $0.4 million and $1.1 million recognized revenue related to the exclusive distribution rights during both of the three and nine months ended September 27, 2025 and September 28, 2024, respectively. Other also includes revenues from paid service, royalty, freight and legacy G probes.

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