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Summary of Significant Accounting Policies - Additional Information (Details) | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 28, 2024 USD ($) Customer | Dec. 30, 2023 USD ($) Customer | Dec. 31, 2023 USD ($) | Jan. 01, 2023 USD ($) | Dec. 31, 2022 USD ($)
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Receivables | $ 259,000 | $ 146,000 | $ 9,700,000 | $ 9,800,000 | $ 390,000
Provision for sales returns | 0 | 0 |  |  |
Gross value of demos and loaners | 2,600,000 | 2,300,000 |  |  |
Accumulated amortization on inventory demos and loaners | $ 2,100,000 | 1,900,000 |  |  |
Estimated useful life of demos and loaners | 4 years |  |  |  |
Estimated useful lives of the assets | 3 years |  |  |  |
Impairments expenses | $ 0 | 0 |  |  |
Capitalized implementation costs | $ 1,100,000 |  |  |  |
Capitalized implementation costs amortization period | 5 years |  |  |  |
Amortization expense | $ 200,000 | 200,000 |  |  |
Accumulated deficit | (88,009,000) | (79,042,000) |  |  |
Amortization cost | $ 83,000 | 83,000 |  |  |
Service contract warranty period | 1 year |  |  |  |
Service contract, period to determine nature of sale | 60 days |  |  |  |
Arrangement fee | $ 200,000 |  |  |  |
Fair value of distribution right | 14,800,000 |  |  |  |
Deferred revenue recognized | $ 2,300,000 | 2,500,000 |  |  |
Products warranty period | 2 years |  |  |  |
Advertising and promotion costs | $ 20,000,000 | 200,000 |  |  |
Accrued interest and penalty incurred | $ 0 | 0 |  |  |
Adoption of ASU 2023-07 |  |  |  |  |
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Change in Accounting Principle, Accounting Standards Update, Adopted | true |  |  |  |
Change in Accounting Principle, Accounting Standards Update, Adoption Date | Jan. 01, 2023 |  |  |  |
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect | true |  |  |  |
Revenue, Total |  |  |  |  |
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Impairments expenses | $ 0 | 0 |  |  |
Amortization cost | $ 200,000 | $ 100,000 |  |  |
Revenue, Total | Minimum |  |  |  |  |
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 | Customer Concentration Risk | Topcon [Member] |  |  |  |  |
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Number of customers | Customer | 1 | 1 |  |  |
Receivables | Credit Concentration Risk | Topcon [Member] |  |  |  |  |
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Number of customers | Customer | 1 | 1 |  |  |
Percentage of accounts receivable accounted | 29.00% | 30.00% |  |  |
Receivables | Credit Concentration Risk | One Customer | Topcon [Member] | Minimum |  |  |  |  |
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 | Customer Concentration Risk | Topcon [Member] |  |  |  |  |
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Percentage of accounts receivable accounted | 35.00% | 30.00% |  |  |
Revenue, Total | Customer Concentration Risk | One Customer | Topcon [Member] | Minimum |  |  |  |  |
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 | $ 1,500,000 | $ 1,500,000 |  |  |
Intellectual Property [Member] |  |  |  |  |
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Number of customers | Customer | 3 |  |  |  |
Shipping and Handling |  |  |  |  |
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Shipping and handling costs | $ 300,000 | 200,000 |  |  |
Prepaid Expenses and Other Current Assets and Other Long Term Assets |  |  |  |  |
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Deferred costs incurred | 600,000 | $ 700,000 |  |  |
Prepaid Expenses and Other Current Assets and Other Long Term Assets | Revenue, Total |  |  |  |  |
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Deferred costs incurred | $ 200,000 |  |  |  |

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