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Prepayments, Deposits and Other Current Assets - Schedule Of Prepayments, Deposits and Other Current Assets (Parenthetical) (Details)	Dec. 28, 2018	Dec. 29, 2017
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Percent of prepayments deposits and other current assets included in other	5.00%	5.00%

X

- Definition

Percent of prepayments deposits and other current assets included in other.

+ References

No definition available.

+ Details

Name:	staa_PercentOfPrepaymentsDepositsAndOtherCurrentAssetsIncludedInOther
Namespace Prefix:	staa_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration