Other Current Liabilities - Schedule of Other Current Liabilities (Parenthetical) (Details)	Mar. 29, 2019	Dec. 28, 2018
Other Liabilities Disclosure [Abstract]
Percent of Other Current Liabilities Included in Other	5.00%	5.00%

Percent of other current liabilities included in other.

No definition available.

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