<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2025"
  xmlns:ecd="http://xbrl.sec.gov/ecd/2025"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="xpon-20251231.xsd" xlink:type="simple"/>
    <context id="From2025-01-01to2025-12-31">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001894954</identifier>
        </entity>
        <period>
            <startDate>2025-01-01</startDate>
            <endDate>2025-12-31</endDate>
        </period>
    </context>
    <dei:AmendmentFlag contextRef="From2025-01-01to2025-12-31" id="Fact000003">false</dei:AmendmentFlag>
    <dei:EntityCentralIndexKey contextRef="From2025-01-01to2025-12-31" id="Fact000004">0001894954</dei:EntityCentralIndexKey>
    <dei:DocumentType contextRef="From2025-01-01to2025-12-31" id="xdx2ixbrl0010">DEF 14A</dei:DocumentType>
    <dei:EntityRegistrantName contextRef="From2025-01-01to2025-12-31" id="Fact000011">EXPION ENERGY, INC.</dei:EntityRegistrantName>
    <ecd:AwardTmgMnpiDiscTextBlock contextRef="From2025-01-01to2025-12-31" id="Fact000019">&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 10pt"&gt;&lt;b&gt;Policies
and Practices Related to the Grant of Certain Equity Awards&lt;/b&gt;&lt;/span&gt;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 10pt"&gt;&#160;&lt;/span&gt;&lt;/p&gt;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 10pt"&gt;&lt;span class="xdx_phnt_RGlzY2xvc3VyZSAtIEF3YXJkIFRpbWluZyBEaXNjbG9zdXJlAA__" id="xdx_90E_eecd--AwardTmgMethodTextBlock_c20250101__20251231_zFVFqg3AKeVb"&gt;Historically,
&lt;span class="xdx_phnt_RGlzY2xvc3VyZSAtIEF3YXJkIFRpbWluZyBEaXNjbG9zdXJlAA__" id="xdx_90F_eecd--AwardTmgPredtrmndFlag_dbT_c20250101__20251231_zR9MK9Eiv1c6"&gt;we have granted stock options and RSUs&lt;/span&gt; to our employees, executive officers, and non-employee directors pursuant to the terms
of the 2021 Plan. We do not have any formal policy that requires us to grant, or avoid granting, stock options or RSUs on particular
dates. The grant of equity awards pursuant to the 2021 Plan is discretionary and such awards are periodically granted to our named
executive officers upon approval of the Compensation Committee.&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 10pt"&gt;&#160;&lt;/span&gt;&lt;/p&gt;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 10pt"&gt;&lt;span class="xdx_phnt_RGlzY2xvc3VyZSAtIEF3YXJkIFRpbWluZyBEaXNjbG9zdXJlAA__" id="xdx_90A_eecd--AwardTmgHowMnpiCnsdrdTextBlock_c20250101__20251231_zk4fQQeaUlXk"&gt;We
&lt;span class="xdx_phnt_RGlzY2xvc3VyZSAtIEF3YXJkIFRpbWluZyBEaXNjbG9zdXJlAA__" id="xdx_902_eecd--AwardTmgMnpiCnsdrdFlag_dbF_c20250101__20251231_zsaBXBn70ML3"&gt;do not&lt;/span&gt; schedule the grant of equity awards in anticipation of the release of material nonpublic information (&#x201c;MNPI&#x201d;),
nor do &lt;span class="xdx_phnt_RGlzY2xvc3VyZSAtIEF3YXJkIFRpbWluZyBEaXNjbG9zdXJlAA__" id="xdx_90D_eecd--MnpiDiscTimedForCompValFlag_dbT_c20250101__20251231_zQYcyo6ws4Fg"&gt;we time the release of MNPI&lt;/span&gt; based on actual or anticipated equity grant dates. Furthermore, we do not time the disclosure
of MNPI for the purpose of affecting the value of executive compensation.&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 10pt"&gt;&#160;&lt;/span&gt;&lt;/p&gt;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 10pt"&gt;Our
Compensation Committee did not take MNPI into account when determining the timing and terms of equity awards granted in 2025.
During 2025, no grants were made to any of our named executive officers in the period beginning four business days before (a)
the filing of a Quarterly Report on Form 10-Q or Annual Report on Form 10-K, or (b) the filing or furnishing of a Form 8-K that
discloses MNPI, and ending one business day after the filing or furnishing of any such report.&lt;/span&gt;&lt;/p&gt;&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 10pt"&gt;&#160;&lt;/span&gt;&lt;/p&gt;</ecd:AwardTmgMnpiDiscTextBlock>
    <ecd:AwardTmgMethodTextBlock contextRef="From2025-01-01to2025-12-31" id="Fact000020">Historically,
&lt;span class="xdx_phnt_RGlzY2xvc3VyZSAtIEF3YXJkIFRpbWluZyBEaXNjbG9zdXJlAA__" id="xdx_90F_eecd--AwardTmgPredtrmndFlag_dbT_c20250101__20251231_zR9MK9Eiv1c6"&gt;we have granted stock options and RSUs&lt;/span&gt; to our employees, executive officers, and non-employee directors pursuant to the terms
of the 2021 Plan. We do not have any formal policy that requires us to grant, or avoid granting, stock options or RSUs on particular
dates. The grant of equity awards pursuant to the 2021 Plan is discretionary and such awards are periodically granted to our named
executive officers upon approval of the Compensation Committee.</ecd:AwardTmgMethodTextBlock>
    <ecd:AwardTmgPredtrmndFlag contextRef="From2025-01-01to2025-12-31" id="Fact000021">true</ecd:AwardTmgPredtrmndFlag>
    <ecd:AwardTmgHowMnpiCnsdrdTextBlock contextRef="From2025-01-01to2025-12-31" id="Fact000022">We
&lt;span class="xdx_phnt_RGlzY2xvc3VyZSAtIEF3YXJkIFRpbWluZyBEaXNjbG9zdXJlAA__" id="xdx_902_eecd--AwardTmgMnpiCnsdrdFlag_dbF_c20250101__20251231_zsaBXBn70ML3"&gt;do not&lt;/span&gt; schedule the grant of equity awards in anticipation of the release of material nonpublic information (&#x201c;MNPI&#x201d;),
nor do &lt;span class="xdx_phnt_RGlzY2xvc3VyZSAtIEF3YXJkIFRpbWluZyBEaXNjbG9zdXJlAA__" id="xdx_90D_eecd--MnpiDiscTimedForCompValFlag_dbT_c20250101__20251231_zQYcyo6ws4Fg"&gt;we time the release of MNPI&lt;/span&gt; based on actual or anticipated equity grant dates. Furthermore, we do not time the disclosure
of MNPI for the purpose of affecting the value of executive compensation.</ecd:AwardTmgHowMnpiCnsdrdTextBlock>
    <ecd:AwardTmgMnpiCnsdrdFlag contextRef="From2025-01-01to2025-12-31" id="Fact000023">false</ecd:AwardTmgMnpiCnsdrdFlag>
    <ecd:MnpiDiscTimedForCompValFlag contextRef="From2025-01-01to2025-12-31" id="Fact000024">true</ecd:MnpiDiscTimedForCompValFlag>
</xbrl>
