Summary of Significant Accounting Policies - Additional Information (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 01, 2022 USD ($) Customer	Oct. 02, 2021 Customer	Oct. 01, 2022 USD ($) Customer	Oct. 02, 2021 USD ($) Customer	Jan. 01, 2022 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	$ 20		42
Impairments expenses	0		0
Deferred revenue recognized			900	$ 800
Non-current portion of deferred revenue pertains to exclusivity fee deferred revenue	11,500		11,500
Current portion of deferred revenue pertains to exclusivity fee deferred revenue	$ 1,500		$ 1,500
Products warranty period			2 years
Capitalized implementation costs amortization period	5 years		5 years
Amortization expense	$ 0		$ 0
Prepaid Expenses and Other Current Assets and Other Long Term Assets
Disclosure Summary Of Significant Accounting Policies [Line Items]
Deferred costs incurred	800		800
Capitalized implementation costs	500		500
Revenue, Total
Disclosure Summary Of Significant Accounting Policies [Line Items]
Amortization cost	19		19
Impairments expenses	$ 0		$ 0
Revenue, Total | Minimum
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	$ 200		$ 200
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] | Customer Concentration Risk
Disclosure Summary Of Significant Accounting Policies [Line Items]
Number of customers | Customer			1
Percentage of accounts receivable accounted			37.00%
Accounts Receivable | Topcon [Member] | Customer Concentration Risk | One Customer
Disclosure Summary Of Significant Accounting Policies [Line Items]
Percentage of accounts receivable accounted					31.00%
Accounts Receivable | Topcon [Member] | Customer Concentration Risk | One Customer | 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%
Accounts Receivable | Topcon [Member] | Customer Concentration Risk | Customer Two
Disclosure Summary Of Significant Accounting Policies [Line Items]
Percentage of accounts receivable accounted					11.00%
Accounts Receivable | Topcon [Member] | Credit Concentration Risk
Disclosure Summary Of Significant Accounting Policies [Line Items]
Number of customers | Customer					2
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%		10.00%
Revenue, Total | Topcon [Member] | Customer Concentration Risk
Disclosure Summary Of Significant Accounting Policies [Line Items]
Percentage of accounts receivable accounted	31.00%	21.00%	29.00%	15.00%
Revenue, Total | Topcon [Member] | Customer Concentration Risk | One Customer | 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	$ 400		$ 1,000
Royalty Agreements
Disclosure Summary Of Significant Accounting Policies [Line Items]
Number of customers | Customer			4