Business Segments - Schedule of Revenue Information by Product (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 28, 2025	Jun. 29, 2024	Jun. 28, 2025	Jun. 29, 2024
Entity Wide Information Revenue From External Customer [Line Items]
Total revenues		$ 13,571	$ 12,631	$ 25,467	$ 24,392
Cyclo G6
Entity Wide Information Revenue From External Customer [Line Items]
Total revenues		3,294	3,336	6,475	6,289
Retina
Entity Wide Information Revenue From External Customer [Line Items]
Total revenues		8,047	7,295	14,692	14,069
Other
Entity Wide Information Revenue From External Customer [Line Items]
Total revenues	[1]	$ 2,230	$ 2,000	$ 4,300	$ 4,034

[1] (1) Includes service contract revenues of $0.3 million and $0.1 million, and $0.6 million and $0.4 million recognized during the three and six months ended June 28, 2025 and June 29, 2024, respectively. Includes $0.3 million and $0.7 million recognized revenue related to the exclusive distribution rights during both of the three and six months ended June 28, 2025 and June 29, 2024, respectively. Other also includes revenues from paid service, royalty, freight and legacy G probes.