<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2026"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="staa-20260908.xsd" xlink:type="simple"/>
    <context id="C_8f1d8b96-e2aa-443f-817a-846d7f198895">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000718937</identifier>
        </entity>
        <period>
            <startDate>2026-09-08</startDate>
            <endDate>2026-09-08</endDate>
        </period>
    </context>
    <dei:AmendmentFlag
      contextRef="C_8f1d8b96-e2aa-443f-817a-846d7f198895"
      id="F_65f8377b-aa67-46b2-aa15-551a0b3293b7">true</dei:AmendmentFlag>
    <dei:EntityCentralIndexKey
      contextRef="C_8f1d8b96-e2aa-443f-817a-846d7f198895"
      id="F_72682290-2ba5-4e7c-8232-d8ef15734da1">0000718937</dei:EntityCentralIndexKey>
    <dei:SecurityExchangeName
      contextRef="C_8f1d8b96-e2aa-443f-817a-846d7f198895"
      id="F_0ba940f8-39e9-4b69-b336-6aba477d7203">NONE</dei:SecurityExchangeName>
    <dei:DocumentType
      contextRef="C_8f1d8b96-e2aa-443f-817a-846d7f198895"
      id="F_27c676e2-c4a1-4815-8012-d768639398f2">8-K/A</dei:DocumentType>
    <dei:DocumentPeriodEndDate
      contextRef="C_8f1d8b96-e2aa-443f-817a-846d7f198895"
      id="F_ca5a94f0-a378-4516-8a84-6c9fe7b78e6f">2026-09-08</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName
      contextRef="C_8f1d8b96-e2aa-443f-817a-846d7f198895"
      id="F_932fc256-50bb-442b-beee-d41396d2c259">STAAR Surgical Company</dei:EntityRegistrantName>
    <dei:EntityIncorporationStateCountryCode
      contextRef="C_8f1d8b96-e2aa-443f-817a-846d7f198895"
      id="F_2b3f08b4-01ea-44e2-b53d-1ccfe2aebb19">DE</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber
      contextRef="C_8f1d8b96-e2aa-443f-817a-846d7f198895"
      id="F_489b3b3c-2307-455b-8b00-deb9a6f2a08b">0-11634</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber
      contextRef="C_8f1d8b96-e2aa-443f-817a-846d7f198895"
      id="F_39941fad-0809-4300-bb0a-ec574fc67fbd">95-3797439</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1
      contextRef="C_8f1d8b96-e2aa-443f-817a-846d7f198895"
      id="F_29e5c1d9-afde-46bb-bddc-ff1b25a8508d">25510 Commercentre Drive</dei:EntityAddressAddressLine1>
    <dei:EntityAddressCityOrTown
      contextRef="C_8f1d8b96-e2aa-443f-817a-846d7f198895"
      id="F_b4e0e3a5-dcd9-4992-865d-eb65e163eb22">Lake Forest</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince
      contextRef="C_8f1d8b96-e2aa-443f-817a-846d7f198895"
      id="F_66a2d536-81f9-4ac6-b5c0-a556c515128d">CA</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode
      contextRef="C_8f1d8b96-e2aa-443f-817a-846d7f198895"
      id="F_c784a093-d447-4549-9876-ba983142b977">92630</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode
      contextRef="C_8f1d8b96-e2aa-443f-817a-846d7f198895"
      id="F_279e52fe-650b-43a9-92b0-1e2a106eb9bb">(626)</dei:CityAreaCode>
    <dei:LocalPhoneNumber
      contextRef="C_8f1d8b96-e2aa-443f-817a-846d7f198895"
      id="F_372c5ae1-4b1e-4a1e-b8dd-552b0daa2478">303-7902</dei:LocalPhoneNumber>
    <dei:WrittenCommunications
      contextRef="C_8f1d8b96-e2aa-443f-817a-846d7f198895"
      id="F_4bdcc26f-c4b4-482b-a326-4745f9707e9e">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial
      contextRef="C_8f1d8b96-e2aa-443f-817a-846d7f198895"
      id="F_a59a2428-d9e6-43ab-9ff7-37227e00e03c">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer
      contextRef="C_8f1d8b96-e2aa-443f-817a-846d7f198895"
      id="F_8c51b2e4-2b2d-49d6-a302-de283ad03a08">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer
      contextRef="C_8f1d8b96-e2aa-443f-817a-846d7f198895"
      id="F_47adee49-d861-4629-840a-589fedd3b030">false</dei:PreCommencementIssuerTenderOffer>
    <dei:Security12bTitle
      contextRef="C_8f1d8b96-e2aa-443f-817a-846d7f198895"
      id="F_e11726c5-3d9c-4285-aa47-0d34b1f53e4c">Common</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="C_8f1d8b96-e2aa-443f-817a-846d7f198895"
      id="F_9911b9f2-c145-4add-80bb-737bc40a285d">STAA</dei:TradingSymbol>
    <dei:EntityEmergingGrowthCompany
      contextRef="C_8f1d8b96-e2aa-443f-817a-846d7f198895"
      id="F_0498fdbf-ff39-41be-9a59-99a508ec9849">false</dei:EntityEmergingGrowthCompany>
    <dei:AmendmentDescription
      contextRef="C_8f1d8b96-e2aa-443f-817a-846d7f198895"
      id="F_7dd5d2cb-df5d-4dc1-9ee3-c947c15984a8">This Amendment No. 1 to the Current Report on Form 8-K originally filed on September 10, 2026, is being filed solely to correct an administrative error whereby the previously described dollar value of equity awarded was correct, but the allocation among the types of equity awards was not consistent with the terms of the offer letter.  This Amendment updates the disclosure to reflect the correct mix of equity awards and files a corrected copy of the offer letter as Exhibit 10.1. The full text of the original Form 8-K is set forth below as previously filed, except for the aforementions corrections.</dei:AmendmentDescription>
</xbrl>
