v3.26.1
Summary of Significant Accounting Policies - Additional Information (Details)
$ in Thousands
 3 Months Ended
Apr. 04, 2026
USD ($)
Segment
Customer
Mar. 29, 2025
USD ($)
Customer
Jan. 03, 2026
USD ($)
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 $ 21  
Impairments expenses 0 0  
Deferred revenue recognized 400 600  
Non-current portion of deferred revenue pertains to exclusivity fee deferred revenue 6,400    
Current portion of deferred revenue pertains to exclusivity fee deferred revenue $ 1,500    
Products warranty period 2 years    
Capitalized implementation costs $ 1,100    
Capitalized implementation costs amortization period 5 years    
Amortization expense $ 57 57  
Assets of consolidated variable interest entities 28,274   $ 29,151
Liabilities of consolidated variable interest entities 23,542   24,229
Variable Interest Entity, Primary Beneficiary [Member]      
Disclosure Summary Of Significant Accounting Policies [Line Items]      
Assets of consolidated variable interest entities 120   74
Liabilities of consolidated variable interest entities 74   $ 74
Prepaid Expenses and Other Current Assets and Other Long Term Assets      
Disclosure Summary Of Significant Accounting Policies [Line Items]      
Deferred costs incurred 500    
Revenue, Total      
Disclosure Summary Of Significant Accounting Policies [Line Items]      
Amortization cost 0 19  
Impairments expenses $ 0 $ 0  
Revenue, Total | Minimum [Member]      
Disclosure Summary Of Significant Accounting Policies [Line Items]      
Amortization period 2 years    
Revenue, Total | Maximum [Member]      
Disclosure Summary Of Significant Accounting Policies [Line Items]      
Amortization period 3 years    
Revenue, Total | Topcon [Member] | Customer Concentration Risk      
Disclosure Summary Of Significant Accounting Policies [Line Items]      
Number of customers | Customer 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 19.00% 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 27.00% 30.00%  
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%  
Distribution Rights [Member]      
Disclosure Summary Of Significant Accounting Policies [Line Items]      
Revenue Recognized $ 400 $ 400  
Royalty Agreements      
Disclosure Summary Of Significant Accounting Policies [Line Items]      
Number of customers | Customer 2