Summary of Significant Accounting Policies - Additional Information (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 27, 2025 USD ($) Customer	Sep. 28, 2024 USD ($) Customer	Sep. 27, 2025 USD ($) Customer Segment	Sep. 28, 2024 USD ($) Customer	Dec. 28, 2024 Customer
Disclosure Summary Of Significant Accounting Policies [Line Items]
Number of operating segments | Segment			1
Service contract warranty period			1 year
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]			srt:ChiefExecutiveOfficerMember
Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description			The CODM allocates resources and evaluates the performance of the Company at the consolidated level using information about its revenues, gross profit, income from operations, and other key financial data.
Service contract, period to determine nature of sale			60 days
Arrangement fee			$ 200
Fair value of distribution right			14,800
Amortization cost	$ 21	$ 62	21	$ 62
Impairments expenses	0	0	0	0
Deferred revenue recognized			1,700	1,900
Non-current portion of deferred revenue pertains to exclusivity fee deferred revenue	7,100		7,100
Current portion of deferred revenue pertains to exclusivity fee deferred revenue	1,500		$ 1,500
Products warranty period			2 years
Capitalized implementation costs	$ 1,100		$ 1,100
Capitalized implementation costs amortization period	5 years		5 years
Amortization expense			$ 200	200
Prepaid Expenses and Other Current Assets and Other Long Term Assets
Disclosure Summary Of Significant Accounting Policies [Line Items]
Deferred costs incurred	$ 500		500
Revenue, Total
Disclosure Summary Of Significant Accounting Policies [Line Items]
Amortization cost	0	19	23	57
Impairments expenses	$ 0	$ 0	$ 0	$ 0
Revenue, Total | Minimum [Member]
Disclosure Summary Of Significant Accounting Policies [Line Items]
Amortization period	2 years		2 years
Revenue, Total | Maximum [Member]
Disclosure Summary Of Significant Accounting Policies [Line Items]
Amortization period	3 years		3 years
Revenue, Total | Topcon [Member] | Customer Concentration Risk
Disclosure Summary Of Significant Accounting Policies [Line Items]
Number of customers | Customer	1	1	1	1
Accounts Receivable | Topcon [Member] | Credit Concentration Risk
Disclosure Summary Of Significant Accounting Policies [Line Items]
Number of customers | Customer			1		1
Percentage of accounts receivable accounted			25.00%		29.00%
Accounts Receivable | Topcon [Member] | Credit Concentration Risk | One Customer | Minimum [Member]
Disclosure Summary Of Significant Accounting Policies [Line Items]
Customer and supplier accounted percentage of total revenues, accounts receivable and purchases			10.00%		10.00%
Revenue, Total | Topcon [Member] | Customer Concentration Risk
Disclosure Summary Of Significant Accounting Policies [Line Items]
Percentage of accounts receivable accounted	31.00%	33.00%	32.00%	33.00%
Revenue, Total | Topcon [Member] | Customer Concentration Risk | One Customer | Minimum [Member]
Disclosure Summary Of Significant Accounting Policies [Line Items]
Customer and supplier accounted percentage of total revenues, accounts receivable and purchases	10.00%	10.00%	10.00%	10.00%
Distribution Rights [Member]
Disclosure Summary Of Significant Accounting Policies [Line Items]
Revenue Recognized	$ 400	$ 400	$ 1,100	$ 1,100
Royalty Agreements
Disclosure Summary Of Significant Accounting Policies [Line Items]
Number of customers | Customer			3