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Stockholders' Equity - Schedule of Share-based Compensation, Fair Value of Stock-Based Compensation Granted (Details) $ in Thousands	12 Months Ended
	Dec. 28, 2018 USD ($)
Schedule of Employee Service Share-based Compensation [Line Items]
Total stock-based compensation expense	$ 10,886
Stock Options
Schedule of Employee Service Share-based Compensation [Line Items]
Total stock-based compensation expense	9,702
Restricted Stock Units (RSUs)
Schedule of Employee Service Share-based Compensation [Line Items]
Total stock-based compensation expense	849
Restricted Stock
Schedule of Employee Service Share-based Compensation [Line Items]
Total stock-based compensation expense	$ 335

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- 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

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- Definition

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

+ References

No definition available.

+ Details

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Namespace Prefix:	staa_
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Period Type:	duration

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- Details

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X

- Details

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Balance Type:
Period Type:

X

- Details

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