<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xml:lang="en-US"
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2026"
  xmlns:ffd="http://xbrl.sec.gov/ffd/2026"
  xmlns:iso4217="http://www.xbrl.org/2003/iso4217"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xbrldi="http://xbrl.org/2006/xbrldi"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef
      xlink:href="https://xbrl.sec.gov/ffd/2026/ffd-2026.xsd"
      xlink:type="simple"/>
    <context id="c-1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001935979</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>1</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-05-04</startDate>
            <endDate>2026-05-04</endDate>
        </period>
    </context>
    <context id="c-2">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001935979</identifier>
        </entity>
        <period>
            <startDate>2026-05-04</startDate>
            <endDate>2026-05-04</endDate>
        </period>
    </context>
    <context id="c-3">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001935979</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OffsetAxis">
                    <dei:lineNo>1</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-05-04</startDate>
            <endDate>2026-05-04</endDate>
        </period>
    </context>
    <context id="c-4">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001935979</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OffsetAxis">
                    <dei:lineNo>2</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-05-04</startDate>
            <endDate>2026-05-04</endDate>
        </period>
    </context>
    <unit id="usd">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="number">
        <measure>pure</measure>
    </unit>
    <dei:EntityCentralIndexKey contextRef="c-2" id="f-33">0001935979</dei:EntityCentralIndexKey>
    <dei:EntityRegistrantName contextRef="c-2" id="f-34">Biohaven Ltd.</dei:EntityRegistrantName>
    <ffd:FormTp contextRef="c-2" id="f-35">S-3</ffd:FormTp>
    <ffd:SubmissnTp contextRef="c-2" id="f-36">424B5</ffd:SubmissnTp>
    <ffd:FeeExhibitTp contextRef="c-2" id="f-37">EX-FILING FEES</ffd:FeeExhibitTp>
    <ffd:CombinedProspectusTableNa contextRef="c-2" id="f-38">N/A</ffd:CombinedProspectusTableNa>
    <ffd:RegnFileNb contextRef="c-2" id="f-39">333-295531</ffd:RegnFileNb>
    <ffd:PrevslyPdFlg contextRef="c-1" id="f-1">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="c-1" id="f-2">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="c-1" id="f-3">Common Shares, no par value per share</ffd:OfferingSctyTitl>
    <ffd:Rule457oFlg contextRef="c-1" id="f-4">true</ffd:Rule457oFlg>
    <ffd:MaxAggtOfferingPric contextRef="c-1" decimals="2" id="f-5" unitRef="usd">350000000</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate contextRef="c-1" decimals="INF" id="f-6" unitRef="number">0.0001381</ffd:FeeRate>
    <ffd:FeeAmt contextRef="c-1" decimals="2" id="f-7" unitRef="usd">48335</ffd:FeeAmt>
    <ffd:TtlOfferingAmt contextRef="c-2" decimals="2" id="f-8" unitRef="usd">350000000</ffd:TtlOfferingAmt>
    <ffd:TtlFeeAmt contextRef="c-2" decimals="2" id="f-9" unitRef="usd">48335</ffd:TtlFeeAmt>
    <ffd:TtlPrevslyPdAmt contextRef="c-2" decimals="2" id="f-10" unitRef="usd">0.00</ffd:TtlPrevslyPdAmt>
    <ffd:TtlOffsetAmt contextRef="c-2" decimals="2" id="f-11" unitRef="usd">17519.09</ffd:TtlOffsetAmt>
    <ffd:NetFeeAmt contextRef="c-2" decimals="2" id="f-12" unitRef="usd">30815.91</ffd:NetFeeAmt>
    <ffd:OfferingNote contextRef="c-1" id="f-13">The maximum aggregate offering price is being used to calculate the registration fee pursuant to Rule 457(o) under the Securities Act of 1933, as amended (the "Securities Act"). In accordance with Rule 456(b) and Rule 457(r) under the Securities Act, the registrant initially deferred payment of all of the registration fee for the Registration Statement on Form S-3ASR (File No. 333-295531) filed by the registrant on May 4, 2026.</ffd:OfferingNote>
    <ffd:OffsetClmdInd contextRef="c-3" id="f-14">true</ffd:OffsetClmdInd>
    <ffd:Rule457pOffsetFlg contextRef="c-3" id="f-15">true</ffd:Rule457pOffsetFlg>
    <ffd:OffsetPrrFilerNm contextRef="c-3" id="f-16">Biohaven Ltd.</ffd:OffsetPrrFilerNm>
    <ffd:OffsetPrrFormTp contextRef="c-3" id="f-17">S-3</ffd:OffsetPrrFormTp>
    <ffd:OffsetPrrFileNb contextRef="c-3" id="f-18">333-274822</ffd:OffsetPrrFileNb>
    <ffd:OffsetClmInitlFilgDt contextRef="c-3" id="f-19">2023-10-02</ffd:OffsetClmInitlFilgDt>
    <ffd:OffsetClmdAmt contextRef="c-3" decimals="2" id="f-20" unitRef="usd">17519.09</ffd:OffsetClmdAmt>
    <ffd:OffsetPrrSctyTp contextRef="c-3" id="f-21">Equity</ffd:OffsetPrrSctyTp>
    <ffd:OffsetPrrSctyTitl contextRef="c-3" id="f-22">Common Shares, no par value per share</ffd:OffsetPrrSctyTitl>
    <ffd:OffsetPrrUnsoldOfferingAmt contextRef="c-3" decimals="2" id="f-23" unitRef="usd">118693000</ffd:OffsetPrrUnsoldOfferingAmt>
    <ffd:OffsetClmdInd contextRef="c-4" id="f-24">false</ffd:OffsetClmdInd>
    <ffd:Rule457pOffsetFlg contextRef="c-4" id="f-25">true</ffd:Rule457pOffsetFlg>
    <ffd:OffsetPrrFilerNm contextRef="c-4" id="f-26">Biohaven Ltd</ffd:OffsetPrrFilerNm>
    <ffd:OffsetPrrFormTp contextRef="c-4" id="f-27">S-3</ffd:OffsetPrrFormTp>
    <ffd:OffsetPrrFileNb contextRef="c-4" id="f-28">333-274822</ffd:OffsetPrrFileNb>
    <ffd:OffsetSrcFilgDt contextRef="c-4" id="f-29">2024-08-16</ffd:OffsetSrcFilgDt>
    <ffd:OffsetPrrFeeAmt contextRef="c-4" decimals="2" id="f-30" unitRef="usd">44280</ffd:OffsetPrrFeeAmt>
    <ffd:TermntnCmpltnWdrwl contextRef="c-3" id="f-32">&lt;div&gt;&lt;span style="color:#000000;font-family:'Arial',sans-serif;font-size:12pt;font-weight:400;line-height:100%"&gt;The registrant previously registered the offer, sale and issuance of common shares having an aggregate offering price of up to $300,000,000 by means of a prospectus supplement filed pursuant to Rule 424(b)(5) under the Securities Act on August 16, 2024 (the &#x201c;prior prospectus supplement&#x201d;), pursuant to the Company&#x2019;s registration statement on Form S-3 (File No. 333-274822), filed on October 2, 2023 (the &#x201c;2023 Registration Statement&#x201d;), with the Securities and Exchange Commission. In connection with the filing of the prior prospectus supplement, the registrant paid filing fees of $44,280.00. As of the date of this prospectus supplement, common shares having an aggregate offering price of $118,693,000.00 remain unsold under the prior prospectus supplement. Pursuant to Rule 457(p), $17,519.09 of the filing fee previously paid with respect to the unsold securities under the prior prospectus supplement is being applied to the filing fee payable with respect to this prospectus supplement. The registrant has completed the offering that included the unsold common shares under the prior prospectus supplement and the 2023 Registration Statement.&lt;/span&gt;&lt;/div&gt;</ffd:TermntnCmpltnWdrwl>
    <ffd:OffsetNote contextRef="c-3" id="f-31">&lt;div&gt;&lt;span style="color:#000000;font-family:'Arial',sans-serif;font-size:12pt;font-weight:400;line-height:100%"&gt;The registrant previously registered the offer, sale and issuance of common shares having an aggregate offering price of up to $300,000,000 by means of a prospectus supplement filed pursuant to Rule 424(b)(5) under the Securities Act on August 16, 2024 (the &#x201c;prior prospectus supplement&#x201d;), pursuant to the Company&#x2019;s registration statement on Form S-3 (File No. 333-274822), filed on October 2, 2023 (the &#x201c;2023 Registration Statement&#x201d;), with the Securities and Exchange Commission. In connection with the filing of the prior prospectus supplement, the registrant paid filing fees of $44,280.00. As of the date of this prospectus supplement, common shares having an aggregate offering price of $118,693,000.00 remain unsold under the prior prospectus supplement. Pursuant to Rule 457(p), $17,519.09 of the filing fee previously paid with respect to the unsold securities under the prior prospectus supplement is being applied to the filing fee payable with respect to this prospectus supplement. The registrant has completed the offering that included the unsold common shares under the prior prospectus supplement and the 2023 Registration Statement.&lt;/span&gt;&lt;/div&gt;</ffd:OffsetNote>
</xbrl>
