<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2026"
  xmlns:ecd="http://xbrl.sec.gov/ecd/2026"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="rea-20260928.xsd" xlink:type="simple"/>
    <context id="C_e0b2ee4d-3560-4fa7-a4ec-601490c4e3bc">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002095743</identifier>
        </entity>
        <period>
            <startDate>2025-01-01</startDate>
            <endDate>2025-12-31</endDate>
        </period>
    </context>
    <dei:EntityCentralIndexKey
      contextRef="C_e0b2ee4d-3560-4fa7-a4ec-601490c4e3bc"
      id="F_a75976e4-a7be-4a48-9ad9-f395b7c4482d">0002095743</dei:EntityCentralIndexKey>
    <dei:AmendmentFlag
      contextRef="C_e0b2ee4d-3560-4fa7-a4ec-601490c4e3bc"
      id="F_f6568185-b88d-4c24-9129-ee68aa446cc0">false</dei:AmendmentFlag>
    <dei:DocumentType
      contextRef="C_e0b2ee4d-3560-4fa7-a4ec-601490c4e3bc"
      id="F_31237e1b-8404-4d12-9502-cd5eb3b5d990">DEF 14A</dei:DocumentType>
    <dei:EntityRegistrantName
      contextRef="C_e0b2ee4d-3560-4fa7-a4ec-601490c4e3bc"
      id="F_76747199-4515-46aa-9a36-279b5b83692a">Rare Earths Americas, Inc.</dei:EntityRegistrantName>
    <ecd:InsiderTrdPoliciesProcAdoptedFlag
      contextRef="C_e0b2ee4d-3560-4fa7-a4ec-601490c4e3bc"
      id="F_6ca41c8b-e8fa-4c5b-8b64-08110da95186">true</ecd:InsiderTrdPoliciesProcAdoptedFlag>
    <ecd:AwardTmgMnpiDiscTextBlock
      contextRef="C_e0b2ee4d-3560-4fa7-a4ec-601490c4e3bc"
      id="F_a0697e4c-d1b5-4f5a-903a-f8003309a4e2">&lt;p style="tab-size:26.66px;font-size:10pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"&gt;&lt;span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;font-kerning:none;min-width:fit-content;"&gt;Policies and Practices for Granting Stock Options and Stock Appreciation Rights&lt;/span&gt;&lt;/p&gt;&lt;p style="tab-size:26.66px;font-size:10pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:justify;"&gt;&lt;span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;font-kerning:none;min-width:fit-content;"&gt;We do not have a formal written policy in place with regard to the timing of stock option or stock appreciation awards in relation to the disclosure of material nonpublic information.  To date, the Compensation Committee has not issued stock options or stock appreciation awards.&lt;/span&gt;&lt;/p&gt;</ecd:AwardTmgMnpiDiscTextBlock>
</xbrl>
