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Disaggregation of Revenues, Geographic Sales and Product Sales - Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas (Details) - Property, Plant and Equipment - USD ($) $ in Thousands | Dec. 28, 2018 | Dec. 29, 2017
--- | --- | ---
Geographic and Product Data [Line Items] |  |
Property, plant and equipment, net | $ 11,694 | $ 10,047
US |  |
Geographic and Product Data [Line Items] |  |
Property, plant and equipment, net | 10,416 | 8,523
SWITZERLAND |  |
Geographic and Product Data [Line Items] |  |
Property, plant and equipment, net | 705 | 912
JAPAN |  |
Geographic and Product Data [Line Items] |  |
Property, plant and equipment, net | $ 573 | $ 612

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- Definition Line items represents the geographic and product data. + References No definition available. + Details
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- Definition Property plant and equipment and intangible assets net excluding goodwill. + References No definition available. + Details
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Namespace Prefix: | staa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Details
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Namespace Prefix: |
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- Details
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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