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Basis of Presentation and Significant Accounting Policies (Details 1) - USD ($) $ in Thousands | Jun. 29, 2018 | Dec. 29, 2017
--- | --- | ---
Estimated returns - inventory | [1] | $ 462 | $ 534
Allowance for sales returns |  | $ 2,582 | $ 2,546
[1] | Recognized in inventories, net on the Condensed Consolidated Balance Sheets

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

X
- 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