XML 64 R52.htm IDEA: XBRL DOCUMENT
v3.19.2

Income Taxes - Additional Information (Details) | 6 Months Ended
--- | ---
Jun. 28, 2019 USD ($)
Income Tax Disclosure [Abstract] |
Percentage of deduction in GILTI | 50.00%
Income tax reconciliation of global intangible low-taxed income | $ 7,699,000
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax | $ 273,000

X
- Definition Income tax reconciliation of global intangible low-taxed income. + References No definition available. + Details
Name: | staa_IncomeTaxReconciliationOfGlobalIntangibleLowTaxedIncome
Namespace Prefix: | staa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Tax cuts and jobs act of 2017, deduction in global intangible low taxed income, percentage. + References No definition available. + Details
Name: | staa_TaxCutsAndJobsActOf2017DeductionInGlobalIntangibleLowTaxedIncomePercentage
Namespace Prefix: | staa_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible alternative minimum tax credit carryforwards. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32632-109319 + Details
Name: | us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_IncomeTaxDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration