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Organization and Description of Business and Accounting Policies - Summary of Estimated Sales Return (Details) - USD ($) $ in Thousands | Dec. 28, 2018 | Dec. 29, 2017
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Accounting Policies [Abstract] |  |  |
Estimated returns - inventory | [1] | $ 722 | $ 534
Allowance for sales returns | [2] | $ 2,895 | $ 2,182
[1] | Recognized in inventories, net on the Consolidated Balance Sheets
[2] | For 2017, recognized in accounts receivable trade, net on the Consolidated Balance Sheets

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- Definition Amount of inventory estimated to be returned from the buyer. + References No definition available. + Details
Name: | staa_EstimatedReturnInventoryValue
Namespace Prefix: | staa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition A allowance for the amount of products sold that the entity expects to be returned by the purchaser recorded as current liabilities + References No definition available. + Details
Name: | staa_SalesReturnsValuationAllowance
Namespace Prefix: | staa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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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