XML 93 R81.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Income Taxes - Schedule of Valuation Allowance Release (Recapture) (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2021 | Jan. 01, 2021 | Jan. 03, 2020
Income Taxes [Line Items] |  |  |
Valuation allowance release (recapture) | $ (845,000) | $ 495,000 | $ 3,376,000
Federal |  |  |
Income Taxes [Line Items] |  |  |
Valuation allowance release (recapture) | (739,000) | 573,000 | 3,003,000
State |  |  |
Income Taxes [Line Items] |  |  |
Valuation allowance release (recapture) | $ (106,000) | $ (78,000) | $ 373,000

X
- Definition Line items represent the income taxes. + References No definition available. + Details
Name: | staa_IncomeTaxesLineItems
Namespace Prefix: | staa_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319 + Details
Name: | us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_DomesticCountryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_StateAndLocalJurisdictionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |