<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2025"
  xmlns:ffd="http://xbrl.sec.gov/ffd/2025"
  xmlns:iso4217="http://www.xbrl.org/2003/iso4217"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
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  xmlns:xlink="http://www.w3.org/1999/xlink"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <link:schemaRef
      xlink:href="https://xbrl.sec.gov/ffd/2025/ffd-2025.xsd"
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    <context id="rc">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001980845</identifier>
        </entity>
        <period>
            <startDate>2025-09-10</startDate>
            <endDate>2025-09-10</endDate>
        </period>
    </context>
    <context id="offrl_1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001980845</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
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        <period>
            <startDate>2025-09-10</startDate>
            <endDate>2025-09-10</endDate>
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    <context id="offrl_2">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001980845</identifier>
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        <period>
            <startDate>2025-09-10</startDate>
            <endDate>2025-09-10</endDate>
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    <context id="offrl_3">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001980845</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>3</dei:lineNo>
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        <period>
            <startDate>2025-09-10</startDate>
            <endDate>2025-09-10</endDate>
        </period>
    </context>
    <context id="offrl_4">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001980845</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>4</dei:lineNo>
                </xbrldi:typedMember>
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        </entity>
        <period>
            <startDate>2025-09-10</startDate>
            <endDate>2025-09-10</endDate>
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    <unit id="USD">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="pure">
        <measure>pure</measure>
    </unit>
    <unit id="Shares">
        <measure>shares</measure>
    </unit>
    <ffd:FormTp contextRef="rc" id="ixv-231">S-8</ffd:FormTp>
    <ffd:SubmissnTp contextRef="rc" id="ixv-232">S-8</ffd:SubmissnTp>
    <ffd:FeeExhibitTp contextRef="rc" id="ixv-233">EX-FILING FEES</ffd:FeeExhibitTp>
    <dei:EntityCentralIndexKey contextRef="rc" id="ixv-234">0001980845</dei:EntityCentralIndexKey>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-235">enGene Holdings Inc.</dei:EntityRegistrantName>
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    <ffd:OffsetTableNa contextRef="rc" id="hiddenrcOffsetTableNa">N/A</ffd:OffsetTableNa>
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    <ffd:PrevslyPdFlg contextRef="offrl_2" id="ixv-239">false</ffd:PrevslyPdFlg>
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    <ffd:FormTp contextRef="rc" id="ixv-293">S-8</ffd:FormTp>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-294">enGene Holdings Inc.</dei:EntityRegistrantName>
    <ffd:OfferingSctyTp contextRef="offrl_1" id="ixv-295">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="offrl_1" id="ixv-296">Common Shares, no par value per share</ffd:OfferingSctyTitl>
    <ffd:FeesOthrRuleFlg contextRef="offrl_1" id="ixv-297">true</ffd:FeesOthrRuleFlg>
    <ffd:AmtSctiesRegd
      contextRef="offrl_1"
      decimals="0"
      id="ixv-298"
      unitRef="Shares">2000000</ffd:AmtSctiesRegd>
    <ffd:MaxOfferingPricPerScty
      contextRef="offrl_1"
      decimals="INF"
      id="ixv-299"
      unitRef="USD">5.35</ffd:MaxOfferingPricPerScty>
    <ffd:MaxAggtOfferingPric
      contextRef="offrl_1"
      decimals="INF"
      id="ixv-300"
      unitRef="USD">10700000.00</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="offrl_1"
      decimals="INF"
      id="ixv-301"
      unitRef="pure">0.0001531</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="offrl_1"
      decimals="INF"
      id="ixv-302"
      unitRef="USD">1638.17</ffd:FeeAmt>
    <ffd:OfferingSctyTp contextRef="offrl_2" id="ixv-303">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="offrl_2" id="ixv-304">Common Shares, no par value per share</ffd:OfferingSctyTitl>
    <ffd:FeesOthrRuleFlg contextRef="offrl_2" id="ixv-305">true</ffd:FeesOthrRuleFlg>
    <ffd:AmtSctiesRegd
      contextRef="offrl_2"
      decimals="0"
      id="ixv-306"
      unitRef="Shares">144650</ffd:AmtSctiesRegd>
    <ffd:MaxOfferingPricPerScty
      contextRef="offrl_2"
      decimals="INF"
      id="ixv-307"
      unitRef="USD">4.44</ffd:MaxOfferingPricPerScty>
    <ffd:MaxAggtOfferingPric
      contextRef="offrl_2"
      decimals="INF"
      id="ixv-308"
      unitRef="USD">642246.00</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="offrl_2"
      decimals="INF"
      id="ixv-309"
      unitRef="pure">0.0001531</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="offrl_2"
      decimals="INF"
      id="ixv-310"
      unitRef="USD">98.33</ffd:FeeAmt>
    <ffd:OfferingSctyTp contextRef="offrl_3" id="ixv-311">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="offrl_3" id="ixv-312">Common Shares, no par value per share</ffd:OfferingSctyTitl>
    <ffd:FeesOthrRuleFlg contextRef="offrl_3" id="ixv-313">true</ffd:FeesOthrRuleFlg>
    <ffd:AmtSctiesRegd
      contextRef="offrl_3"
      decimals="0"
      id="ixv-314"
      unitRef="Shares">416250</ffd:AmtSctiesRegd>
    <ffd:MaxOfferingPricPerScty
      contextRef="offrl_3"
      decimals="INF"
      id="ixv-315"
      unitRef="USD">3.31</ffd:MaxOfferingPricPerScty>
    <ffd:MaxAggtOfferingPric
      contextRef="offrl_3"
      decimals="INF"
      id="ixv-316"
      unitRef="USD">1377787.50</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="offrl_3"
      decimals="INF"
      id="ixv-317"
      unitRef="pure">0.0001531</ffd:FeeRate>
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      contextRef="offrl_3"
      decimals="INF"
      id="ixv-318"
      unitRef="USD">210.94</ffd:FeeAmt>
    <ffd:OfferingSctyTp contextRef="offrl_4" id="ixv-319">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="offrl_4" id="ixv-320">Common Shares, no par value per share</ffd:OfferingSctyTitl>
    <ffd:FeesOthrRuleFlg contextRef="offrl_4" id="ixv-321">true</ffd:FeesOthrRuleFlg>
    <ffd:AmtSctiesRegd
      contextRef="offrl_4"
      decimals="0"
      id="ixv-322"
      unitRef="Shares">93200</ffd:AmtSctiesRegd>
    <ffd:MaxOfferingPricPerScty
      contextRef="offrl_4"
      decimals="INF"
      id="ixv-323"
      unitRef="USD">3.79</ffd:MaxOfferingPricPerScty>
    <ffd:MaxAggtOfferingPric
      contextRef="offrl_4"
      decimals="INF"
      id="ixv-324"
      unitRef="USD">353228.00</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="offrl_4"
      decimals="INF"
      id="ixv-325"
      unitRef="pure">0.0001531</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="offrl_4"
      decimals="INF"
      id="ixv-326"
      unitRef="USD">54.08</ffd:FeeAmt>
    <ffd:TtlOfferingAmt contextRef="rc" decimals="INF" id="ixv-327" unitRef="USD">13073261.50</ffd:TtlOfferingAmt>
    <ffd:TtlFeeAmt contextRef="rc" decimals="INF" id="ixv-328" unitRef="USD">2001.52</ffd:TtlFeeAmt>
    <ffd:TtlOffsetAmt contextRef="rc" decimals="INF" id="ixv-329" unitRef="USD">0.00</ffd:TtlOffsetAmt>
    <ffd:NetFeeAmt contextRef="rc" decimals="INF" id="ixv-330" unitRef="USD">2001.52</ffd:NetFeeAmt>
    <ffd:OfferingNote contextRef="offrl_1" id="ixv-331">(a) Pursuant to Rule 416 under the Securities Act of 1933, as amended (the "Securities Act"), the registrant is also registering an indeterminate number of additional common shares, without par value (the "Common Shares") that may become issuable as a result of any stock dividend, stock split, recapitalization or other similar transaction. (b) Consists of 2,000,000 Common Shares issuable pursuant to the enGene Holdings Inc. 2025 Employee Stock Purchase Plan (the "ESPP") approved by the Registrant's shareholders on June 10, 2025 at its 2025 Annual General Meeting of shareholders. (c) Estimated in accordance with Rule 457(c) and Rule 457(h) promulgated under the Securities Act solely for the purpose of calculating the registration fee based on $ 5.35, which is the average of the high and low prices of the Common Shares as reported on the Nasdaq Capital Market on September 9, 2025. Pursuant to the ESPP, the purchase price per each share of common stock reserved for issuance thereunder will be eighty-five percent (85%) of the lower of (i) the Fair Market Value per Share on the Offering Date of the applicable Purchase Period or (ii) the Fair Market Value per Share on the Purchase Date of the applicable Purchase Period (as such terms are defined in the ESPP).</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="offrl_2" id="ixv-332">(a) Pursuant to Rule 416 under the Securities Act of 1933, as amended (the "Securities Act"), the registrant is also registering an indeterminate number of additional common shares, without par value (the "Common Shares") that may become issuable as a result of any stock dividend, stock split, recapitalization or other similar transaction. (b) Represents the maximum number of Common Shares issuable pursuant to the inducement stock option awards made pursuant to and in accordance with the inducement grant exception under Nasdaq Listing Rule 5635(c)(4). (c) Estimated in accordance with Rule 457(h) promulgated under the Securities Act solely for the purpose of calculating the registration fee based upon the exercise price of the inducement options.</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="offrl_3" id="ixv-333">See Offering Note 2(a), 2(b) and 2(c). </ffd:OfferingNote>
    <ffd:OfferingNote contextRef="offrl_4" id="ixv-334">See Offering Note 2(a), 2(b) and 2(c).</ffd:OfferingNote>
</xbrl>
