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Other Current Liabilities (Details Textual)	12 Months Ended
	Jan. 01, 2016
Other Liabilities, Current [Line Items]
Percentage Of Other Current Liabilities	5.00%	[1]
[1] No item in "Other" above exceeds 5% of total other current liabilities.

X

- Definition

Line items represents the other current liabilities.

+ References

No definition available.

+ Details

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

X

- Definition

Represent the percentage of total other current liabilities.

+ References

No definition available.

+ Details

Name:	staa_PercentageOfOtherCurrentLiabilities
Namespace Prefix:	staa_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration