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Summary of Significant Accounting Policies - Additional Information (Details)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 28, 2024
USD ($)
Customer
Sep. 30, 2023
USD ($)
Customer
Sep. 28, 2024
USD ($)
Customer
Sep. 30, 2023
USD ($)
Customer
Dec. 30, 2023
Customer
Disclosure Summary Of Significant Accounting Policies [Line Items]          
Service contract warranty period     1 year    
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     1,900 1,300  
Non-current portion of deferred revenue pertains to exclusivity fee deferred revenue 8,600   8,600    
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
Amortization expense   12 $ 200    
Prepaid Expenses and Other Current Assets and Other Long Term Assets          
Disclosure Summary Of Significant Accounting Policies [Line Items]          
Deferred costs incurred 600   600    
Revenue, Total          
Disclosure Summary Of Significant Accounting Policies [Line Items]          
Amortization cost 19 57 19 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 | Prepaid Expenses and Other Current Assets and Other Long Term Assets          
Disclosure Summary Of Significant Accounting Policies [Line Items]          
Deferred costs incurred $ 42   $ 42    
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     23.00%   30.00%
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 33.00% 34.00% 33.00% 29.00%  
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     2