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Other Current Liabilities - Schedule of Other Current Liabilities (Parenthetical) (Details)	Dec. 28, 2018	Dec. 29, 2017
Other Liabilities Disclosure [Abstract]
Percent of Other Current Liabilities Included in Other	5.00%	5.00%

X

- Definition

Percent of other current liabilities included in other.

+ References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

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