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