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Summary of Significant Accounting Policies - Additional Information (Details) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2022 USD ($) | Jan. 01, 2022 USD ($) Customer | Jan. 02, 2021 USD ($) Customer
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |
Provision for sales returns |  | $ 0 | $ 0
Gross value of demos and loaners |  | 2,000,000.0 | 1,900,000
Accumulated amortization on inventory demos and loaners |  | $ 1,700,000 | 1,700,000
Estimated useful life of demos and loaners |  | 4 years |
Estimated useful lives of the assets |  | 3 years |
Amortization costs |  | $ 0 |
Service contract warranty period |  | 1 year |
Service contract, period to determine nature of sale |  | 60 days |
Arrangement fee |  | $ 2,000,000.0 |
Arrangement expiration period |  | 9 months |
Fair value of distribution right |  | $ 14,800,000 |
Customer deposit |  | 200,000 |
Deferred revenue recognized |  | $ 900,000 | 1,300,000
Products warranty period |  | 2 years |
Advertising and promotion costs |  | $ 200,000 | 100,000
Accrued interest and penalty incurred |  | $ 0 | $ 0
ASU 2019-12 |  |  |
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, 2022 |
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect |  | true |
Revenue, Total | Customer Concentration Risk |  |  |
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |
Number of customers | Customer |  |  | 0
Revenue, Total | Customer Concentration Risk | Topcon |  |  |
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |
Number of customers | Customer |  | 1 |
Accounts Receivable | Customer Concentration Risk | Minimum |  |  |
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |
Customer and supplier accounted percentage of total revenues, accounts receivable and purchases |  |  | 10.00%
Accounts Receivable | Customer Concentration Risk | Topcon | Minimum |  |  |
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |
Customer and supplier accounted percentage of total revenues, accounts receivable and purchases |  | 10.00% |
Accounts Receivable | Customer Concentration Risk | One Customer |  |  |
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |
Percentage of accounts receivable accounted |  |  | 13.00%
Accounts Receivable | Customer Concentration Risk | One Customer | Topcon |  |  |
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |
Percentage of accounts receivable accounted |  | 31.00% |
Accounts Receivable | Customer Concentration Risk | Customer Two | Topcon |  |  |
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |
Percentage of accounts receivable accounted |  | 11.00% |
Accounts Receivable | Credit Concentration Risk | Topcon |  |  |
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |
Number of customers | Customer |  | 2 | 1
Revenue, Total | Customer Concentration Risk | Topcon |  |  |
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |
Percentage of revenues accounted |  | 21.00% |
Revenue, Total | Customer Concentration Risk | One Customer | Topcon | Minimum |  |  |
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |
Customer and supplier accounted percentage of total revenues, accounts receivable and purchases |  | 10.00% |
Revenue, Total | Customer Concentration Risk | No Customer | Minimum |  |  |
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |
Customer and supplier accounted percentage of total revenues, accounts receivable and purchases |  |  | 10.00%
Subsequent Event [Member] |  |  |
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |
Arrangement fee refund received | $ 1,800,000 |  |
Distribution Rights [Member] |  |  |
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |
Revenue Recognized |  | $ 600,000 |
Royalty Agreements |  |  |
Disclosure Summary Of Significant Accounting Policies [Line Items] |  |  |
Number of customers | Customer |  | 2 |
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 |  | $ 300,000 |

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