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Organization and Description of Business and Accounting Policies - Schedule of Sales and Marketing Expenses for Distinct Services (Details) - USD ($) $ in Thousands | 12 Months Ended
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Jan. 03, 2020 | Dec. 28, 2018 | Dec. 29, 2017
Accounting Policies [Abstract] |  |  |
Marketing and support services related to strategic cooperation agreements | $ 485 | $ 629 | $ 120

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- Definition The amount of sales and marketing expenses for distinct services under Strategic Cooperation Agreements. + References No definition available. + Details
Name: | staa_MarketingAndSupportServicesRelatedToStrategicCooperationAgreements
Namespace Prefix: | staa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration