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Stockholders’ Equity (Details) $ in Thousands	12 Months Ended
	Dec. 29, 2017 USD ($)
Schedule of Employee Service Share-based Compensation [Line Items]
Share-based Compensation, Granted	$ 8,771
Stock Options [Member]
Schedule of Employee Service Share-based Compensation [Line Items]
Share-based Compensation, Granted	4,985
Restricted Stock Units (RSUs) [Member]
Schedule of Employee Service Share-based Compensation [Line Items]
Share-based Compensation, Granted	3,586
Restricted Stock [Member]
Schedule of Employee Service Share-based Compensation [Line Items]
Share-based Compensation, Granted	$ 200

X

- Definition

Line items represent the schedule of employee service share-based compensation.

+ References

No definition available.

+ Details

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Namespace Prefix:	staa_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

This element represents the amount of fair value of stock compensation granted during the period.

+ References

No definition available.

+ Details

Name:	staa_SharebasedCompensationArrangementBySharebasedPaymentAwardGrantedInPeriodFairValue
Namespace Prefix:	staa_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_AwardTypeAxis=staa_StockOptionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_RestrictedStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: