<SEC-DOCUMENT>0001193125-25-210068.txt : 20250922
<SEC-HEADER>0001193125-25-210068.hdr.sgml : 20250922
<ACCEPTANCE-DATETIME>20250922081103
ACCESSION NUMBER:		0001193125-25-210068
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		13
CONFORMED PERIOD OF REPORT:	20250922
ITEM INFORMATION:		Regulation FD Disclosure
ITEM INFORMATION:		Other Events
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20250922
DATE AS OF CHANGE:		20250922

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Adverum Biotechnologies, Inc.
		CENTRAL INDEX KEY:			0001501756
		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
		ORGANIZATION NAME:           	03 Life Sciences
		EIN:				205258327
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36579
		FILM NUMBER:		251328484

	BUSINESS ADDRESS:	
		STREET 1:		100 CARDINAL WAY
		CITY:			REDWOOD CITY
		STATE:			CA
		ZIP:			94063
		BUSINESS PHONE:		(650) 649-1004

	MAIL ADDRESS:	
		STREET 1:		100 CARDINAL WAY
		CITY:			REDWOOD CITY
		STATE:			CA
		ZIP:			94063

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Avalanche Biotechnologies, Inc.
		DATE OF NAME CHANGE:	20100921
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>d937976d8k.htm
<DESCRIPTION>8-K
<TEXT>
<XBRL>
<?xml version='1.0' encoding='ASCII'?>
<html xmlns:dei="http://xbrl.sec.gov/dei/2025" xmlns:us-types="http://fasb.org/us-types/2025" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:advm="http://www.adverum.com/20250922" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:utr="http://www.xbrl.org/2009/utr" xmlns:iso4217="http://www.xbrl.org/2003/iso4217" xmlns:ix="http://www.xbrl.org/2013/inlineXBRL" xmlns:ixt="http://www.xbrl.org/inlineXBRL/transformation/2015-02-26" xmlns:ixt-sec="http://www.sec.gov/inlineXBRL/transformation/2015-08-31" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xbrldi="http://xbrl.org/2006/xbrldi" xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>8-K</title>
<meta http-equiv="Content-Type" content="text/html"/>
</head>
   <body><div style="display:none"> <ix:header> <ix:hidden> <ix:nonNumeric id="Hidden_dei_SecurityExchangeName" name="dei:SecurityExchangeName" contextRef="duration_2025-09-22_to_2025-09-22">NASDAQ</ix:nonNumeric> <ix:nonNumeric name="dei:AmendmentFlag" contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-262">false</ix:nonNumeric> <ix:nonNumeric id="Hidden_dei_EntityCentralIndexKey" name="dei:EntityCentralIndexKey" contextRef="duration_2025-09-22_to_2025-09-22">0001501756</ix:nonNumeric> </ix:hidden> <ix:references> <link:schemaRef xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase" xlink:type="simple" xlink:href="advm-20250922.xsd" xlink:arcrole="http://www.xbrl.org/2003/linkbase"/> </ix:references> <ix:resources> <xbrli:context id="duration_2025-09-22_to_2025-09-22"> <xbrli:entity> <xbrli:identifier scheme="http://www.sec.gov/CIK">0001501756</xbrli:identifier> </xbrli:entity> <xbrli:period> <xbrli:startDate>2025-09-22</xbrli:startDate> <xbrli:endDate>2025-09-22</xbrli:endDate> </xbrli:period> </xbrli:context> </ix:resources> </ix:header> </div> <div style="text-align:center"> <div style="width:8.5in;text-align:left;margin-left: auto;margin-right: auto"> <div style="line-height:1.0pt;margin-top:0pt;margin-bottom:0pt;border-bottom:1px solid #000000">&#160;</div> <div style="line-height:3.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1px solid #000000">&#160;</div> <p style="margin-top:4pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman;font-weight:bold;text-align:center">UNITED STATES</p> <p style="margin-top:0pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman;font-weight:bold;text-align:center">SECURITIES AND EXCHANGE COMMISSION</p> <p style="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman;font-weight:bold;text-align:center">Washington, D.C. 20549</p> <p style="font-size:9pt;margin-top:0pt;margin-bottom:0pt">&#160;</p> <div style="text-align:center"> <div style="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%;text-align:center;margin-left: auto;margin-right: auto">&#160;</div></div> <p style="margin-top:9pt; margin-bottom:0pt; font-size:18pt; font-family:Times New Roman;font-weight:bold;text-align:center">FORM <span style="white-space:nowrap"><ix:nonNumeric name="dei:DocumentType" contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-273">8-K</ix:nonNumeric></span></p> <p style="font-size:9pt;margin-top:0pt;margin-bottom:0pt">&#160;</p> <div style="text-align:center"> <div style="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%;text-align:center;margin-left: auto;margin-right: auto">&#160;</div></div> <p style="margin-top:9pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman;font-weight:bold;text-align:center">CURRENT REPORT</p> <p style="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman;font-weight:bold;text-align:center">Pursuant to Section&#160;13 or 15(d)</p> <p style="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman;font-weight:bold;text-align:center">of the Securities Exchange Act of 1934</p> <p style="margin-top:9pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman;font-weight:bold;text-align:center"><ix:nonNumeric name="dei:DocumentPeriodEndDate" contextRef="duration_2025-09-22_to_2025-09-22" format="ixt:datemonthdayyearen" id="ixv-274">September&#160;22, 2025</ix:nonNumeric></p> <p style="margin-top:0pt; margin-bottom:0pt; font-size:12pt; font-family:Times New Roman;font-weight:bold;text-align:center">Date of Report (Date of earliest event reported)</p> <p style="font-size:9pt;margin-top:0pt;margin-bottom:0pt">&#160;</p> <div style="text-align:center"> <div style="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%;text-align:center;margin-left: auto;margin-right: auto">&#160;</div></div> <p style="margin-top:9pt; margin-bottom:0pt; font-size:24pt; font-family:Times New Roman;font-weight:bold;text-align:center"><ix:nonNumeric name="dei:EntityRegistrantName" contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-275">Adverum Biotechnologies, Inc.</ix:nonNumeric></p> <p style="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold;text-align:center">(Exact name of registrant as specified in its charter)</p> <p style="font-size:9pt;margin-top:0pt;margin-bottom:0pt">&#160;</p> <div style="text-align:center"> <div style="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%;text-align:center;margin-left: auto;margin-right: auto">&#160;</div></div> <p style="font-size:9pt;margin-top:0pt;margin-bottom:0pt">&#160;</p>
<table cellspacing="0" cellpadding="0" style="border-collapse:collapse; font-family:Times New Roman; font-size:8pt;width:100%;border-spacing:0;margin:0 auto">
<tr>
<td style="width:34%"/>
<td style="vertical-align:bottom"/>
<td style="width:32%"/>
<td style="vertical-align:bottom;width:1%"/>
<td style="width:32%"/></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style="vertical-align:top;text-align:center"><span style="font-weight:bold"><ix:nonNumeric name="dei:EntityIncorporationStateCountryCode" contextRef="duration_2025-09-22_to_2025-09-22" format="ixt-sec:stateprovnameen" id="ixv-276">Delaware</ix:nonNumeric></span></td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:top;text-align:center"><span style="font-weight:bold"><span style="white-space:nowrap"><ix:nonNumeric name="dei:EntityFileNumber" contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-277">001-36579</ix:nonNumeric></span></span></td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:top;text-align:center"><span style="font-weight:bold"><span style="white-space:nowrap"><ix:nonNumeric name="dei:EntityTaxIdentificationNumber" contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-278">20-5258327</ix:nonNumeric></span></span></td></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:8pt">
<td style="vertical-align:top;text-align:center"> <p style="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">(State or other jurisdiction</p> <p style="margin-top:0pt; margin-bottom:1pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">of incorporation)</p></td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:top;text-align:center"> <p style="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">(Commission</p> <p style="margin-top:0pt; margin-bottom:1pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">File Number)</p></td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:top;text-align:center"> <p style="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">(I.R.S. Employer</p> <p style="margin-top:0pt; margin-bottom:1pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">Identification No.)</p></td></tr></table> <p style="margin-top:9pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold;text-align:center"><ix:nonNumeric name="dei:EntityAddressAddressLine1" contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-279">100 Cardinal Way</ix:nonNumeric></p> <p style="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold;text-align:center"><ix:nonNumeric name="dei:EntityAddressCityOrTown" contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-280">Redwood City</ix:nonNumeric>, <ix:nonNumeric name="dei:EntityAddressStateOrProvince" contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-281">CA</ix:nonNumeric> <ix:nonNumeric name="dei:EntityAddressPostalZipCode" contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-282">94063</ix:nonNumeric></p> <p style="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">(Address of principal executive offices, including zip code)</p> <p style="margin-top:9pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold;text-align:center"><ix:nonNumeric name="dei:CityAreaCode" contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-283">(650)</ix:nonNumeric> <span style="white-space:nowrap"><ix:nonNumeric name="dei:LocalPhoneNumber" contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-284">656-9323</ix:nonNumeric></span></p> <p style="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">(Registrant&#8217;s telephone number, including area code)</p> <p style="margin-top:9pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold;text-align:center">N/A</p> <p style="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">(Former name or former address, if changed since last report.)</p> <p style="font-size:9pt;margin-top:0pt;margin-bottom:0pt">&#160;</p> <div style="text-align:center"> <div style="line-height:6.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1.00pt solid #000000;width:21%;text-align:center;margin-left: auto;margin-right: auto">&#160;</div></div> <p style="margin-top:9pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Check the appropriate box below if the Form <span style="white-space:nowrap">8-K</span> filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions:</p> <p style="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&#160;</p>
<table style="border-collapse:collapse; font-family:Times New Roman; font-size:10pt;border-spacing:0;width:100%" cellpadding="0" cellspacing="0">
<tr style="page-break-inside:avoid">
<td style="width:4%;vertical-align:top;text-align:left"><ix:nonNumeric name="dei:WrittenCommunications" contextRef="duration_2025-09-22_to_2025-09-22" format="ixt-sec:boolballotbox" id="ixv-285">&#9744;</ix:nonNumeric></td>
<td style="vertical-align:top;text-align:left"> <p style=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;text-align:left">Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</p></td></tr></table> <p style="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&#160;</p>
<table style="border-collapse:collapse; font-family:Times New Roman; font-size:10pt;border-spacing:0;width:100%" cellpadding="0" cellspacing="0">
<tr style="page-break-inside:avoid">
<td style="width:4%;vertical-align:top;text-align:left"><ix:nonNumeric name="dei:SolicitingMaterial" contextRef="duration_2025-09-22_to_2025-09-22" format="ixt-sec:boolballotbox" id="ixv-286">&#9744;</ix:nonNumeric></td>
<td style="vertical-align:top;text-align:left"> <p style=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;text-align:left">Soliciting material pursuant to Rule <span style="white-space:nowrap">14a-12</span> under the Exchange Act (17 CFR <span style="white-space:nowrap">240.14a-12)</span></p></td></tr></table> <p style="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&#160;</p>
<table style="border-collapse:collapse; font-family:Times New Roman; font-size:10pt;border-spacing:0;width:100%" cellpadding="0" cellspacing="0">
<tr style="page-break-inside:avoid">
<td style="width:4%;vertical-align:top;text-align:left"><ix:nonNumeric name="dei:PreCommencementTenderOffer" contextRef="duration_2025-09-22_to_2025-09-22" format="ixt-sec:boolballotbox" id="ixv-287">&#9744;</ix:nonNumeric></td>
<td style="vertical-align:top;text-align:left"> <p style=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;text-align:left"><span style="white-space:nowrap">Pre-commencement</span> communications pursuant to Rule <span style="white-space:nowrap">14d-2(b)</span> under the Exchange Act (17 CFR <span style="white-space:nowrap">240.14d-2(b))</span></p></td></tr></table> <p style="font-size:6pt;margin-top:0pt;margin-bottom:0pt">&#160;</p>
<table style="border-collapse:collapse; font-family:Times New Roman; font-size:10pt;border-spacing:0;width:100%" cellpadding="0" cellspacing="0">
<tr style="page-break-inside:avoid">
<td style="width:4%;vertical-align:top;text-align:left"><ix:nonNumeric name="dei:PreCommencementIssuerTenderOffer" contextRef="duration_2025-09-22_to_2025-09-22" format="ixt-sec:boolballotbox" id="ixv-288">&#9744;</ix:nonNumeric></td>
<td style="vertical-align:top;text-align:left"> <p style=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;text-align:left"><span style="white-space:nowrap">Pre-commencement</span> communications pursuant to Rule <span style="white-space:nowrap">13e-4(c)</span> under the Exchange Act (17 CFR <span style="white-space:nowrap">240.13e-4(c))</span></p></td></tr></table> <p style="margin-top:9pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">Securities registered pursuant to Section&#160;12(b) of the Act:</p> <p style="font-size:9pt;margin-top:0pt;margin-bottom:0pt">&#160;</p>
<table cellspacing="0" cellpadding="0" style="border-collapse:collapse; font-family:Times New Roman; font-size:8pt;width:100%;border-spacing:0;margin:0 auto">
<tr>
<td style="width:34%"/>
<td style="vertical-align:bottom"/>
<td style="width:32%"/>
<td style="vertical-align:bottom;width:1%"/>
<td style="width:32%"/></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:8pt">
<td style="border-bottom:1.00pt solid #000000;vertical-align:bottom;white-space:nowrap;text-align:center"> <p style="margin-top:0pt; margin-bottom:1pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">Title&#160;of&#160;each&#160;class</p></td>
<td style="vertical-align:bottom">&#160;</td>
<td style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center"> <p style="margin-top:0pt; margin-bottom:1pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">Trading<br/>Symbol(s)</p></td>
<td style="vertical-align:bottom">&#160;</td>
<td style="border-bottom:1.00pt solid #000000;vertical-align:bottom;text-align:center"> <p style="margin-top:0pt; margin-bottom:0pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">Name&#160;of&#160;each&#160;exchange</p> <p style="margin-top:0pt; margin-bottom:1pt; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">on&#160;which&#160;registered</p></td></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style="vertical-align:top;text-align:center"><ix:nonNumeric name="dei:Security12bTitle" contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-289">Common Stock</ix:nonNumeric></td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:top;text-align:center"><ix:nonNumeric name="dei:TradingSymbol" contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-290">ADVM</ix:nonNumeric></td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:top;text-align:center"> <span style=" -sec-ix-hidden:Hidden_dei_SecurityExchangeName">Nasdaq Capital Market</span> </td></tr></table> <p style="margin-top:9pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (&#167; 230.405 of this chapter) or Rule <span style="white-space:nowrap">12b-2</span> of the Securities Exchange Act of 1934 (&#167; <span style="white-space:nowrap">240.12b-2</span> of this chapter).</p> <p style="margin-top:9pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;text-align:right">Emerging growth company&#8194;<ix:nonNumeric name="dei:EntityEmergingGrowthCompany" contextRef="duration_2025-09-22_to_2025-09-22" format="ixt-sec:boolballotbox" id="ixv-291">&#9744;</ix:nonNumeric></p> <p style="margin-top:9pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section&#160;13(a) of the Exchange Act.&#8194;&#9744;</p> <p style="font-size:7pt;margin-top:0pt;margin-bottom:0pt">&#160;</p> <div style="line-height:1.0pt;margin-top:0pt;margin-bottom:0pt;border-bottom:1px solid #000000">&#160;</div> <div style="line-height:3.0pt;margin-top:0pt;margin-bottom:2pt;border-bottom:1px solid #000000">&#160;</div></div></div>

<p style="margin-top:1em; margin-bottom:0em; page-break-before:always"> </p>
<hr style="color:#999999;height:3px;width:100%;clear:both"/>

<div style="text-align:center"><div style="width:8.5in;text-align:left;margin-left: auto;margin-right: auto">

<table style="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt;border-spacing:0;width:100%" cellpadding="0" cellspacing="0">
<tr style="page-break-inside:avoid">
<td style="width:11%;vertical-align:top;text-align:left"><span style="font-weight:bold">Item&#8201;7.01</span></td>
<td style="vertical-align:top;text-align:left"> <p style=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold;text-align:left">Regulation FD Disclosure. </p></td></tr></table> <p style="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">On September&#160;22, 2025, Adverum Biotechnologies, Inc. (the &#8220;Company&#8221;) issued a press release. A copy of the press release is furnished as Exhibit 99.1 to this Current Report and incorporated herein by reference. </p> <p style="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">The information in this Item 7.01, including Exhibit 99.1 attached hereto, is being furnished and shall not be deemed &#8220;filed&#8221; for purposes of Section&#160;18 of the Securities Exchange Act of 1934, as amended (the &#8220;Exchange Act&#8221;), or otherwise subject to the liabilities of that section. The information contained herein and in the accompanying exhibit is not incorporated by reference in any filing of the Company under the Securities Act of 1933, as amended, or the Exchange Act, whether made before or after the date hereof, regardless of any general incorporation language in such filing, except as shall be expressly set forth by specific reference in such filing. </p> <p style="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&#160;</p>
<table style="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt;border-spacing:0;width:100%" cellpadding="0" cellspacing="0">
<tr style="page-break-inside:avoid">
<td style="width:11%;vertical-align:top;text-align:left"><span style="font-weight:bold">Item&#8201;8.01</span></td>
<td style="vertical-align:top;text-align:left"> <p style=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold;text-align:left">Other Events. </p></td></tr></table> <p style="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">The Company announced that it plans to complete screening in the pivotal Phase 3 ARTEMIS trial evaluating <span style="white-space:nowrap">Ixo-vec</span> in wet <span style="white-space:nowrap">age-related</span> macular degeneration this month. The Company expects full enrollment of the ARTEMIS trial in the fourth quarter of 2025, with topline data from the ARTEMIS trial expected to be announced in the first quarter of 2027. </p> <p style="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold">Cautionary Note Regarding Forward-Looking Statements </p> <p style="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">This Current Report on Form <span style="white-space:nowrap">8-K</span> contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including, without limitation, statements regarding the anticipated completion of screening, enrollment and announcement of the topline data results for the ARTEMIS Phase 3 trial. Such forward-looking statements are subject to risks and uncertainties that are often difficult to predict, are beyond the Company&#8217;s control, and which may cause results to differ materially from expectations. In addition, for a further discussion of factors that could materially affect the outcome of the Company&#8217;s forward-looking statements and its future results and financial condition, see &#8220;Risk Factors&#8221; in the Company&#8217;s periodic reports filed with the SEC. The Company does not undertake any obligation to publicly update or revise any forward-looking statement, whether as a result of new information, future events or otherwise. </p> <p style="font-size:18pt;margin-top:0pt;margin-bottom:0pt">&#160;</p>
<table style="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt;border-spacing:0;width:100%" cellpadding="0" cellspacing="0">
<tr style="page-break-inside:avoid">
<td style="width:11%;vertical-align:top;text-align:left"><span style="font-weight:bold">Item&#8201;9.01</span></td>
<td style="vertical-align:top;text-align:left"> <p style=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold;text-align:left">Financial Statements and Exhibits. </p></td></tr></table> <p style="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&#160;</p>
<table cellspacing="0" cellpadding="0" style="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt;width:100%;border-spacing:0;margin:0 auto">


<tr>

<td/>

<td style="vertical-align:bottom;width:4%"/>
<td style="width:93%"/></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:8pt">
<td style="vertical-align:bottom;white-space:nowrap;text-align:center"> <p style=" margin-top:0pt ; margin-bottom:0pt; border-bottom:1.00pt solid #000000; display:inline-block; font-size:8pt; font-family:Times New Roman;font-weight:bold;text-align:center">Exhibit<br/>No.</p></td>
<td style="vertical-align:bottom">&#160;&#160;</td>
<td style="border-bottom:1.00pt solid #000000;vertical-align:bottom;white-space:nowrap"> <p style="margin-top:0pt; margin-bottom:1pt; font-size:8pt; font-family:Times New Roman;font-weight:bold">Description</p></td></tr>


<tr style="font-size:1pt">
<td style="height:6pt"/>
<td style="height:6pt" colspan="2"/></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style="vertical-align:top;white-space:nowrap">99.1</td>
<td style="vertical-align:bottom">&#160;&#160;</td>
<td style="vertical-align:top"><a href="d937976dex991.htm">Press Release dated September&#160;22, 2025.</a></td></tr>
<tr style="font-size:1pt">
<td style="height:6pt"/>
<td style="height:6pt" colspan="2"/></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style="vertical-align:top;white-space:nowrap">104</td>
<td style="vertical-align:bottom">&#160;&#160;</td>
<td style="vertical-align:top">The cover page of this report has been formatted in Inline XBRL.</td></tr>
</table>
</div></div>



<p style="margin-top:1em; margin-bottom:0em; page-break-before:always"> </p>
<hr style="color:#999999;height:3px;width:100%;clear:both"/>

<div style="text-align:center"><div style="width:8.5in;text-align:left;margin-left: auto;margin-right: auto">
 <p style="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;font-weight:bold;text-align:center">SIGNATURE </p> <p style="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. </p> <p style="font-size:12pt;margin-top:0pt;margin-bottom:0pt">&#160;</p>
<table cellspacing="0" cellpadding="0" style="BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt;width:100%;border-spacing:0">


<tr>

<td style="width:45%"/>

<td style="vertical-align:bottom;width:1%"/>
<td style="width:4%"/>

<td style="vertical-align:bottom"/>
<td style="width:3%"/>

<td style="vertical-align:bottom;width:1%"/>
<td style="width:45%"/></tr>


<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style="vertical-align:bottom"/>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom" colspan="3"><span style="font-weight:bold">ADVERUM&#160;BIOTECHNOLOGIES,&#160;INC.</span></td></tr>
<tr style="font-size:1pt">
<td style="height:12pt"/>
<td style="height:12pt" colspan="2"/>
<td style="height:12pt" colspan="2"/>
<td style="height:12pt" colspan="2"/></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style="vertical-align:bottom">Date: September&#160;22, 2025</td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:top">By:</td>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"> <p style="margin-top:0pt; margin-bottom:1pt; border-bottom:1px solid #000000; font-size:10pt; font-family:Times New Roman">/s/ Laurent Fischer</p></td></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style="vertical-align:bottom"/>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom">Laurent Fischer, M.D.</td></tr>
<tr style="page-break-inside:avoid ; font-family:Times New Roman; font-size:10pt">
<td style="vertical-align:bottom"/>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom"/>
<td style="vertical-align:bottom">&#160;</td>
<td style="vertical-align:bottom">President and Chief Executive Officer</td></tr>
</table>
</div></div>

</body></html>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>d937976dex991.htm
<DESCRIPTION>EX-99.1
<TEXT>
<HTML><HEAD>
<TITLE>EX-99.1</TITLE>
</HEAD>
 <BODY BGCOLOR="WHITE" STYLE="line-height:Normal">

<Center><DIV STYLE="width:8.5in" align="left">
 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right">Exhibit 99.1 </P>
<P STYLE="margin-top:24pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Adverum Biotechnologies Announces Completion of Screening for Pivotal Phase 3 ARTEMIS </B></P>
<P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><B>Trial of <FONT STYLE="white-space:nowrap">Ixo-vec</FONT> for Wet <FONT STYLE="white-space:nowrap">Age-Related</FONT> Macular Degeneration
</B></P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><I>- Screening closing ahead of expectations, with full enrollment now anticipated in 4Q 2025 (previously 1Q 2026) </I></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="center"><I>- ARTEMIS topline data readout accelerated to 1Q 2027 </I></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">REDWOOD CITY, Calif., September&nbsp;22, 2025 &#8212; Adverum Biotechnologies, Inc. (Nasdaq: ADVM), a clinical-stage company pioneering the use of
intravitreal gene therapy as a potential One And Done<SUP STYLE="font-size:75%; vertical-align:top">TM</SUP> treatment to preserve sight for life, today announced it has notified sites that it plans to complete screening in ARTEMIS, its first
pivotal Phase 3 trial evaluating <FONT STYLE="white-space:nowrap">Ixo-vec</FONT> in wet <FONT STYLE="white-space:nowrap">age-related</FONT> macular degeneration (wet AMD) by September&nbsp;30, seven months after initiation, because the company now
expects full enrollment of at least 284 <FONT STYLE="white-space:nowrap">treatment-na&iuml;ve</FONT> and treatment experienced patients in 4Q 2025 and data readout in 1Q 2027. </P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">ARTEMIS is the first of two Phase 3 registrational trials for <FONT STYLE="white-space:nowrap">Ixo-vec</FONT> in wet AMD, evaluating a single administration
of <FONT STYLE="white-space:nowrap">Ixo-vec</FONT> (6E10 vg/eye) compared to aflibercept (2mg) every 8 weeks in both <FONT STYLE="white-space:nowrap">treatment-na&iuml;ve</FONT> and previously treated patients. Information about the trial is
available at <U>www.clinicaltrials.gov</U> (ARTEMIS identifier: NCT06856577). </P> <P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>About <FONT STYLE="white-space:nowrap">Ixo-vec</FONT> in Wet AMD
</B></P> <P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Adverum is developing ixoberogene soroparvovec <FONT STYLE="white-space:nowrap">(Ixo-vec,</FONT> formerly referred to as <FONT
STYLE="white-space:nowrap">ADVM-022),</FONT> its clinical-stage gene therapy product candidate, for the treatment of wet AMD. <FONT STYLE="white-space:nowrap">Ixo-vec</FONT> utilizes a proprietary vector capsid, AAV.7m8, carrying an aflibercept
coding sequence under the control of a proprietary expression cassette. Unlike other ophthalmic gene therapies that require surgery to administer the gene therapy under the retina <FONT STYLE="white-space:nowrap">(sub-retinal</FONT> approach), <FONT
STYLE="white-space:nowrap">Ixo-vec</FONT> is designed to be administered as a <FONT STYLE="white-space:nowrap">one-time</FONT> IVT injection in the physician&#8217;s office, deliver long-term efficacy, reduce the burden of frequent anti-VEGF,
optimize patient compliance and improve vision outcomes for patients with wet AMD. In recognition of the need for new treatment options for wet AMD, FDA granted Fast Track and Regenerative Medicine Advanced Therapy (RMAT) designations for <FONT
STYLE="white-space:nowrap">Ixo-vec</FONT> for the treatment of wet AMD. <FONT STYLE="white-space:nowrap">Ixo-vec</FONT> has also received PRIME designation from the EMA and the Innovation Passport from the United Kingdom&#8217;s Medicines and
Healthcare Products Regulatory Agency for the treatment of wet AMD. </P> <P STYLE="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>About Adverum Biotechnologies </B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Adverum Biotechnologies (NASDAQ: ADVM) is a clinical-stage company that aims to establish gene therapy as a new standard of care for highly prevalent ocular
diseases with the aspiration of developing functional cures to restore vision and prevent blindness. Leveraging the capabilities of its proprietary intravitreal platform, Adverum is developing durable, single-administration therapies, designed to be
delivered in physicians&#8217; offices, to eliminate the need for frequent ocular injections to treat these diseases. Adverum is evaluating its novel gene therapy candidate, ixoberogene soroparvovec <FONT STYLE="white-space:nowrap">(Ixo-vec,</FONT>
formerly referred to as <FONT STYLE="white-space:nowrap">ADVM-022),</FONT> as a <FONT STYLE="white-space:nowrap">one-time,</FONT> IVT injection for patients with neovascular or wet <FONT STYLE="white-space:nowrap">age-related</FONT> macular
degeneration. Additionally, by overcoming the challenges associated with current treatment paradigms for debilitating ocular diseases, Adverum aspires to transform the standard of care, preserve vision, and create a profound societal impact around
the globe. For more information, please visit www.adverum.com. </P>
</DIV></Center>


<p style="margin-top:1em; margin-bottom:0em; page-break-before:always"> </p>
<HR SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">

<Center><DIV STYLE="width:8.5in" align="left">

 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman" ALIGN="right"><B>Exhibit 99.1 </B></P>
<p STYLE="margin-top:0pt;margin-bottom:0pt ; font-size:8pt">&nbsp;</P>
 <P STYLE="margin-top:0pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>Forward-looking Statements </B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Statements contained in this press release regarding events or results that may occur in the future are &#8220;forward-looking statements&#8221; within the
meaning of the Private Securities Litigation Reform Act of 1995. Such statements include but are not limited to statements regarding: the therapeutic and commercial potential of <FONT STYLE="white-space:nowrap">Ixo-vec,</FONT> including its
potential to be <FONT STYLE="white-space:nowrap"><FONT STYLE="white-space:nowrap">One-And-Done</FONT></FONT> therapy for wet AMD patients; the anticipated completion of screening, enrollment and announcement of the topline data results for the
ARTEMIS Phase 3 trial; and other statements that are not a historical fact. Actual results could differ materially from those anticipated in such forward-looking statements as a result of various risks and uncertainties, including risks inherent to,
without limitation: Adverum&#8217;s novel technology, which makes it difficult to predict the timing of commencement and completion of clinical trials; regulatory uncertainties; enrollment uncertainties; the results of early clinical trials not
always being predictive of future clinical trials and results; the potential for future complications or side effects in connection with use of <FONT STYLE="white-space:nowrap">Ixo-vec;</FONT> Adverum&#8217;s ability to continue as a going concern
and improve its financial position; and risks associated with market conditions. Additional risks and uncertainties facing Adverum are set forth under the caption &#8220;Risk Factors&#8221; and elsewhere in Adverum&#8217;s Securities and Exchange
Commission (SEC) filings and reports, including Adverum&#8217;s most recent Quarterly Report on <FONT STYLE="white-space:nowrap">Form&nbsp;10-Q</FONT> filed with the SEC on August&nbsp;12, 2025 and subsequent filings with the SEC. All
forward-looking statements contained in this press release speak only as of the date on which they were made. Adverum undertakes no obligation to update such statements to reflect events that occur or circumstances that exist after the date on which
they were made, except as required by law. </P> <P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>Corporate&nbsp;&amp; Investor Inquiries: </B></P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Adverum Investor Relations </P> <P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Email: <U>ir@adverum.com</U></P>
<P STYLE="margin-top:12pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman"><B>Media: </B></P> <P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Jason Awe, Ph.D. </P>
<P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Executive Director, Corporate Communications </P> <P STYLE="margin-top:6pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">Email:
<U>jawe@adverum.com</U> </P>
</DIV></Center>

</BODY></HTML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.SCH
<SEQUENCE>3
<FILENAME>advm-20250922.xsd
<DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA
<TEXT>
<XBRL>
<?xml version="1.0" encoding="us-ascii"?>
<!-- DFIN - https://www.dfinsolutions.com/ -->
<!-- CTU Version: Release 2512 Build:20250722.1 -->
<!-- Creation date: 9/22/2025 10:41:50 AM Eastern Time -->
<!-- Copyright (c) 2025 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
<xsd:schema
  xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric"
  xmlns:num="http://www.xbrl.org/dtr/type/numeric"
  xmlns:us-types="http://fasb.org/us-types/2025"
  xmlns:advm="http://www.adverum.com/20250922"
  xmlns:dei="http://xbrl.sec.gov/dei/2025"
  xmlns:xbrli="http://www.xbrl.org/2003/instance"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xlink="http://www.w3.org/1999/xlink"
  xmlns:xbrldt="http://xbrl.org/2005/xbrldt"
  attributeFormDefault="unqualified"
  elementFormDefault="qualified"
  targetNamespace="http://www.adverum.com/20250922"
  xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <xsd:import schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" namespace="http://www.xbrl.org/2003/instance" />
    <xsd:import schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" namespace="http://www.xbrl.org/2003/linkbase" />
    <xsd:import schemaLocation="https://xbrl.sec.gov/dei/2025/dei-2025.xsd" namespace="http://xbrl.sec.gov/dei/2025" />
    <xsd:import schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd" namespace="http://www.xbrl.org/dtr/type/numeric" />
    <xsd:import schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd" namespace="http://www.xbrl.org/dtr/type/non-numeric" />
    <xsd:import schemaLocation="https://xbrl.sec.gov/naics/2025/naics-2025.xsd" namespace="http://xbrl.sec.gov/naics/2025" />
    <xsd:import schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" namespace="http://xbrl.org/2005/xbrldt" />
  <xsd:annotation>
    <xsd:appinfo>
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="advm-20250922_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:title="Label Links, all" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="advm-20250922_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:title="Presentation Links, all" xlink:type="simple" />
      <link:roleType roleURI="http://www.adverum.com//20250922/taxonomy/role/DocumentDocumentAndEntityInformation" id="Role_DocumentDocumentAndEntityInformation">
        <link:definition>100000 - Document - Document and Entity Information</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xsd:appinfo>
  </xsd:annotation>
</xsd:schema>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.LAB
<SEQUENCE>4
<FILENAME>advm-20250922_lab.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE
<TEXT>
<XBRL>
<?xml version="1.0" encoding="us-ascii" standalone="yes"?>
<!-- DFIN - https://www.dfinsolutions.com/ -->
<!-- CTU Version: Release 2512 Build:20250722.1 -->
<!-- Creation date: 9/22/2025 10:41:50 AM Eastern Time -->
<!-- Copyright (c) 2025 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
<link:linkbase
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xlink="http://www.w3.org/1999/xlink"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:labelLink xlink:role="http://www.xbrl.org/2003/role/link" xlink:type="extended">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CoverAbstract" xlink:type="locator" xlink:label="dei_CoverAbstract" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CoverAbstract" xlink:to="dei_CoverAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_CoverAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Cover [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_CoverAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cover [Abstract]</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SecurityExchangeName" xlink:type="locator" xlink:label="dei_SecurityExchangeName" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_SecurityExchangeName" xlink:to="dei_SecurityExchangeName_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_SecurityExchangeName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Security Exchange Name</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_SecurityExchangeName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Security Exchange Name</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:type="locator" xlink:label="dei_AmendmentFlag" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_AmendmentFlag" xlink:to="dei_AmendmentFlag_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_AmendmentFlag_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Amendment Flag</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_AmendmentFlag_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amendment Flag</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:type="locator" xlink:label="dei_EntityCentralIndexKey" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityCentralIndexKey" xlink:to="dei_EntityCentralIndexKey_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Central Index Key</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Central Index Key</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType" xlink:type="locator" xlink:label="dei_DocumentType" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentType" xlink:to="dei_DocumentType_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_DocumentType_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Document Type</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_DocumentType_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Type</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:type="locator" xlink:label="dei_DocumentPeriodEndDate" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentPeriodEndDate" xlink:to="dei_DocumentPeriodEndDate_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Document Period End Date</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Period End Date</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:type="locator" xlink:label="dei_EntityRegistrantName" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityRegistrantName" xlink:to="dei_EntityRegistrantName_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityRegistrantName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Registrant Name</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityRegistrantName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Registrant Name</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityIncorporationStateCountryCode" xlink:type="locator" xlink:label="dei_EntityIncorporationStateCountryCode" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityIncorporationStateCountryCode" xlink:to="dei_EntityIncorporationStateCountryCode_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Incorporation State Country Code</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Incorporation State Country Code</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFileNumber" xlink:type="locator" xlink:label="dei_EntityFileNumber" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityFileNumber" xlink:to="dei_EntityFileNumber_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityFileNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity File Number</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityFileNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity File Number</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityTaxIdentificationNumber" xlink:type="locator" xlink:label="dei_EntityTaxIdentificationNumber" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityTaxIdentificationNumber" xlink:to="dei_EntityTaxIdentificationNumber_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Tax Identification Number</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Tax Identification Number</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine1" xlink:type="locator" xlink:label="dei_EntityAddressAddressLine1" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressAddressLine1" xlink:to="dei_EntityAddressAddressLine1_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Address Line One</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Address Line One</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCityOrTown" xlink:type="locator" xlink:label="dei_EntityAddressCityOrTown" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressCityOrTown" xlink:to="dei_EntityAddressCityOrTown_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, City or Town</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, City or Town</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressStateOrProvince" xlink:type="locator" xlink:label="dei_EntityAddressStateOrProvince" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressStateOrProvince" xlink:to="dei_EntityAddressStateOrProvince_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, State or Province</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, State or Province</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressPostalZipCode" xlink:type="locator" xlink:label="dei_EntityAddressPostalZipCode" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressPostalZipCode" xlink:to="dei_EntityAddressPostalZipCode_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Postal Zip Code</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Postal Zip Code</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CityAreaCode" xlink:type="locator" xlink:label="dei_CityAreaCode" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CityAreaCode" xlink:to="dei_CityAreaCode_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_CityAreaCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">City Area Code</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_CityAreaCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">City Area Code</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LocalPhoneNumber" xlink:type="locator" xlink:label="dei_LocalPhoneNumber" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_LocalPhoneNumber" xlink:to="dei_LocalPhoneNumber_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_LocalPhoneNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Local Phone Number</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_LocalPhoneNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Local Phone Number</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_WrittenCommunications" xlink:type="locator" xlink:label="dei_WrittenCommunications" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_WrittenCommunications" xlink:to="dei_WrittenCommunications_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_WrittenCommunications_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Written Communications</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_WrittenCommunications_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Written Communications</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SolicitingMaterial" xlink:type="locator" xlink:label="dei_SolicitingMaterial" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_SolicitingMaterial" xlink:to="dei_SolicitingMaterial_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_SolicitingMaterial_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Soliciting Material</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_SolicitingMaterial_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Soliciting Material</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_PreCommencementTenderOffer" xlink:type="locator" xlink:label="dei_PreCommencementTenderOffer" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_PreCommencementTenderOffer" xlink:to="dei_PreCommencementTenderOffer_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_PreCommencementTenderOffer_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Pre Commencement Tender Offer</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_PreCommencementTenderOffer_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pre Commencement Tender Offer</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_PreCommencementIssuerTenderOffer" xlink:type="locator" xlink:label="dei_PreCommencementIssuerTenderOffer" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_PreCommencementIssuerTenderOffer" xlink:to="dei_PreCommencementIssuerTenderOffer_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_PreCommencementIssuerTenderOffer_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Pre Commencement Issuer Tender Offer</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_PreCommencementIssuerTenderOffer_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pre Commencement Issuer Tender Offer</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Security12bTitle" xlink:type="locator" xlink:label="dei_Security12bTitle" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_Security12bTitle" xlink:to="dei_Security12bTitle_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_Security12bTitle_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Security 12b Title</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_Security12bTitle_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Security 12b Title</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_TradingSymbol" xlink:type="locator" xlink:label="dei_TradingSymbol" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_TradingSymbol" xlink:to="dei_TradingSymbol_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_TradingSymbol_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Trading Symbol</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_TradingSymbol_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trading Symbol</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityEmergingGrowthCompany" xlink:type="locator" xlink:label="dei_EntityEmergingGrowthCompany" />
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityEmergingGrowthCompany" xlink:to="dei_EntityEmergingGrowthCompany_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Emerging Growth Company</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Emerging Growth Company</link:label>
  </link:labelLink>
</link:linkbase>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.PRE
<SEQUENCE>5
<FILENAME>advm-20250922_pre.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE
<TEXT>
<XBRL>
<?xml version="1.0" encoding="us-ascii" standalone="yes"?>
<!-- DFIN - https://www.dfinsolutions.com/ -->
<!-- CTU Version: Release 2512 Build:20250722.1 -->
<!-- Creation date: 9/22/2025 10:41:50 AM Eastern Time -->
<!-- Copyright (c) 2025 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
<link:linkbase
    xmlns:link="http://www.xbrl.org/2003/linkbase"
    xmlns:xlink="http://www.w3.org/1999/xlink"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:xbrldt="http://xbrl.org/2005/xbrldt"
    xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.adverum.com//20250922/taxonomy/role/DocumentDocumentAndEntityInformation" xlink:href="advm-20250922.xsd#Role_DocumentDocumentAndEntityInformation" xlink:type="simple" />
  <link:presentationLink xlink:type="extended" xlink:role="http://www.adverum.com//20250922/taxonomy/role/DocumentDocumentAndEntityInformation">
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CoverAbstract" xlink:type="locator" xlink:label="dei_CoverAbstract" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SecurityExchangeName" xlink:type="locator" xlink:label="dei_SecurityExchangeName" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_SecurityExchangeName" order="22.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:type="locator" xlink:label="dei_AmendmentFlag" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_AmendmentFlag" order="23.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:type="locator" xlink:label="dei_EntityCentralIndexKey" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityCentralIndexKey" order="24.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType" xlink:type="locator" xlink:label="dei_DocumentType" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_DocumentType" order="26.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:type="locator" xlink:label="dei_DocumentPeriodEndDate" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_DocumentPeriodEndDate" order="27.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:type="locator" xlink:label="dei_EntityRegistrantName" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityRegistrantName" order="28.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityIncorporationStateCountryCode" xlink:type="locator" xlink:label="dei_EntityIncorporationStateCountryCode" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityIncorporationStateCountryCode" order="29.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFileNumber" xlink:type="locator" xlink:label="dei_EntityFileNumber" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityFileNumber" order="30.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityTaxIdentificationNumber" xlink:type="locator" xlink:label="dei_EntityTaxIdentificationNumber" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityTaxIdentificationNumber" order="31.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine1" xlink:type="locator" xlink:label="dei_EntityAddressAddressLine1" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityAddressAddressLine1" order="32.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCityOrTown" xlink:type="locator" xlink:label="dei_EntityAddressCityOrTown" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityAddressCityOrTown" order="33.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressStateOrProvince" xlink:type="locator" xlink:label="dei_EntityAddressStateOrProvince" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityAddressStateOrProvince" order="34.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressPostalZipCode" xlink:type="locator" xlink:label="dei_EntityAddressPostalZipCode" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityAddressPostalZipCode" order="35.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CityAreaCode" xlink:type="locator" xlink:label="dei_CityAreaCode" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_CityAreaCode" order="36.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LocalPhoneNumber" xlink:type="locator" xlink:label="dei_LocalPhoneNumber" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_LocalPhoneNumber" order="37.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_WrittenCommunications" xlink:type="locator" xlink:label="dei_WrittenCommunications" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_WrittenCommunications" order="38.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SolicitingMaterial" xlink:type="locator" xlink:label="dei_SolicitingMaterial" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_SolicitingMaterial" order="39.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_PreCommencementTenderOffer" xlink:type="locator" xlink:label="dei_PreCommencementTenderOffer" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_PreCommencementTenderOffer" order="40.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_PreCommencementIssuerTenderOffer" xlink:type="locator" xlink:label="dei_PreCommencementIssuerTenderOffer" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_PreCommencementIssuerTenderOffer" order="41.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Security12bTitle" xlink:type="locator" xlink:label="dei_Security12bTitle" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_Security12bTitle" order="42.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_TradingSymbol" xlink:type="locator" xlink:label="dei_TradingSymbol" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_TradingSymbol" order="43.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityEmergingGrowthCompany" xlink:type="locator" xlink:label="dei_EntityEmergingGrowthCompany" />
    <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityEmergingGrowthCompany" order="44.001" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
  </link:presentationLink>
</link:linkbase>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>7
<FILENAME>R1.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="include/report.css">
<script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script><script type="text/javascript">
							function toggleNextSibling (e) {
							if (e.nextSibling.style.display=='none') {
							e.nextSibling.style.display='block';
							} else { e.nextSibling.style.display='none'; }
							}</script>
</head>
<body>
<span style="display: none;">v3.25.2</span><table class="report" border="0" cellspacing="2" id="id2">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Document and Entity Information<br></strong></div></th>
<th class="th"><div>Sep. 22, 2025</div></th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_CoverAbstract', window );"><strong>Cover [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NASDAQ<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_AmendmentFlag', window );">Amendment Flag</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityCentralIndexKey', window );">Entity Central Index Key</a></td>
<td class="text">0001501756<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_DocumentType', window );">Document Type</a></td>
<td class="text">8-K<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_DocumentPeriodEndDate', window );">Document Period End Date</a></td>
<td class="text">Sep. 22,  2025<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityRegistrantName', window );">Entity Registrant Name</a></td>
<td class="text">Adverum Biotechnologies, Inc.<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityIncorporationStateCountryCode', window );">Entity Incorporation State Country Code</a></td>
<td class="text">DE<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityFileNumber', window );">Entity File Number</a></td>
<td class="text">001-36579<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityTaxIdentificationNumber', window );">Entity Tax Identification Number</a></td>
<td class="text">20-5258327<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressAddressLine1', window );">Entity Address, Address Line One</a></td>
<td class="text">100 Cardinal Way<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressCityOrTown', window );">Entity Address, City or Town</a></td>
<td class="text">Redwood City<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressStateOrProvince', window );">Entity Address, State or Province</a></td>
<td class="text">CA<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressPostalZipCode', window );">Entity Address, Postal Zip Code</a></td>
<td class="text">94063<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_CityAreaCode', window );">City Area Code</a></td>
<td class="text">(650)<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_LocalPhoneNumber', window );">Local Phone Number</a></td>
<td class="text">656-9323<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_WrittenCommunications', window );">Written Communications</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_SolicitingMaterial', window );">Soliciting Material</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_PreCommencementTenderOffer', window );">Pre Commencement Tender Offer</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_PreCommencementIssuerTenderOffer', window );">Pre Commencement Issuer Tender Offer</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_Security12bTitle', window );">Security 12b Title</a></td>
<td class="text">Common Stock<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">ADVM<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityEmergingGrowthCompany', window );">Entity Emerging Growth Company</a></td>
<td class="text">false<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_AmendmentFlag">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_AmendmentFlag</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_CityAreaCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Area code of city</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_CityAreaCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_CoverAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Cover page.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_CoverAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentPeriodEndDate">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentPeriodEndDate</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:dateItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentType">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentType</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:submissionTypeItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressAddressLine1">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Address Line 1 such as Attn, Building Name, Street Name</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressAddressLine1</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressCityOrTown">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Name of the City or Town</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressCityOrTown</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressPostalZipCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Code for the postal or zip code</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressPostalZipCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressStateOrProvince">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Name of the state or province.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressStateOrProvince</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:stateOrProvinceItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityCentralIndexKey">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityCentralIndexKey</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:centralIndexKeyItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityEmergingGrowthCompany">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Indicate if registrant meets the emerging growth company criteria.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityEmergingGrowthCompany</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityFileNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityFileNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:fileNumberItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityIncorporationStateCountryCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Two-character EDGAR code representing the state or country of incorporation.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityIncorporationStateCountryCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:edgarStateCountryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityRegistrantName">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityRegistrantName</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityTaxIdentificationNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityTaxIdentificationNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:employerIdItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_LocalPhoneNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Local phone number for entity.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_LocalPhoneNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_PreCommencementIssuerTenderOffer">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 13e<br> -Subsection 4c<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_PreCommencementIssuerTenderOffer</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_PreCommencementTenderOffer">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 14d<br> -Subsection 2b<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_PreCommencementTenderOffer</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_Security12bTitle">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Title of a 12(b) registered security.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_Security12bTitle</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:securityTitleItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_SecurityExchangeName">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Name of the Exchange on which a security is registered.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection d1-1<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_SecurityExchangeName</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:edgarExchangeCodeItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_SolicitingMaterial">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 14a<br> -Subsection 12<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_SolicitingMaterial</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_TradingSymbol">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Trading symbol of an instrument as listed on an exchange.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_TradingSymbol</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:tradingSymbolItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_WrittenCommunications">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br> -Section 425<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_WrittenCommunications</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
</div>
</body>
</html>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>8
<FILENAME>Show.js
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
// Edgar(tm) Renderer was created by staff of the U.S. Securities and Exchange Commission.  Data and content created by government employees within the scope of their employment are not subject to domestic copyright protection. 17 U.S.C. 105.
var Show={};Show.LastAR=null,Show.showAR=function(a,r,w){if(Show.LastAR)Show.hideAR();var e=a;while(e&&e.nodeName!='TABLE')e=e.nextSibling;if(!e||e.nodeName!='TABLE'){var ref=((window)?w.document:document).getElementById(r);if(ref){e=ref.cloneNode(!0);
e.removeAttribute('id');a.parentNode.appendChild(e)}}
if(e)e.style.display='block';Show.LastAR=e};Show.hideAR=function(){Show.LastAR.style.display='none'};Show.toggleNext=function(a){var e=a;while(e.nodeName!='DIV')e=e.nextSibling;if(!e.style){}else if(!e.style.display){}else{var d,p_;if(e.style.display=='none'){d='block';p='-'}else{d='none';p='+'}
e.style.display=d;if(a.textContent){a.textContent=p+a.textContent.substring(1)}else{a.innerText=p+a.innerText.substring(1)}}}
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>9
<FILENAME>report.css
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
/* Updated 2009-11-04 */
/* v2.2.0.24 */

/* DefRef Styles */
.report table.authRefData{
	background-color: #def;
	border: 2px solid #2F4497;
	font-size: 1em;
	position: absolute;
}

.report table.authRefData a {
	display: block;
	font-weight: bold;
}

.report table.authRefData p {
	margin-top: 0px;
}

.report table.authRefData .hide {
	background-color: #2F4497;
	padding: 1px 3px 0px 0px;
	text-align: right;
}

.report table.authRefData .hide a:hover {
	background-color: #2F4497;
}

.report table.authRefData .body {
	height: 150px;
	overflow: auto;
	width: 400px;
}

.report table.authRefData table{
	font-size: 1em;
}

/* Report Styles */
.pl a, .pl a:visited {
	color: black;
	text-decoration: none;
}

/* table */
.report {
	background-color: white;
	border: 2px solid #acf;
	clear: both;
	color: black;
	font: normal 8pt Helvetica, Arial, san-serif;
	margin-bottom: 2em;
}

.report hr {
	border: 1px solid #acf;
}

/* Top labels */
.report th {
	background-color: #acf;
	color: black;
	font-weight: bold;
	text-align: center;
}

.report th.void	{
	background-color: transparent;
	color: #000000;
	font: bold 10pt Helvetica, Arial, san-serif;
	text-align: left;
}

.report .pl {
	text-align: left;
	vertical-align: top;
	white-space: normal;
	width: 200px;
	white-space: normal; /* word-wrap: break-word; */
}

.report td.pl a.a {
	cursor: pointer;
	display: block;
	width: 200px;
	overflow: hidden;
}

.report td.pl div.a {
	width: 200px;
}

.report td.pl a:hover {
	background-color: #ffc;
}

/* Header rows... */
.report tr.rh {
	background-color: #acf;
	color: black;
	font-weight: bold;
}

/* Calendars... */
.report .rc {
	background-color: #f0f0f0;
}

/* Even rows... */
.report .re, .report .reu {
	background-color: #def;
}

.report .reu td {
	border-bottom: 1px solid black;
}

/* Odd rows... */
.report .ro, .report .rou {
	background-color: white;
}

.report .rou td {
	border-bottom: 1px solid black;
}

.report .rou table td, .report .reu table td {
	border-bottom: 0px solid black;
}

/* styles for footnote marker */
.report .fn {
	white-space: nowrap;
}

/* styles for numeric types */
.report .num, .report .nump {
	text-align: right;
	white-space: nowrap;
}

.report .nump {
	padding-left: 2em;
}

.report .nump {
	padding: 0px 0.4em 0px 2em;
}

/* styles for text types */
.report .text {
	text-align: left;
	white-space: normal;
}

.report .text .big {
	margin-bottom: 1em;
	width: 17em;
}

.report .text .more {
	display: none;
}

.report .text .note {
	font-style: italic;
	font-weight: bold;
}

.report .text .small {
	width: 10em;
}

.report sup {
	font-style: italic;
}

.report .outerFootnotes {
	font-size: 1em;
}
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>11
<FILENAME>FilingSummary.xml
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<XML>
<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.25.2</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>1</ContextCount>
  <ElementCount>22</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>0</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>0</UnitCount>
  <MyReports>
    <Report instance="d937976d8k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>100000 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.adverum.com//20250922/taxonomy/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>advm-20250922.xsd</File>
    <File>advm-20250922_lab.xml</File>
    <File>advm-20250922_pre.xml</File>
    <File doctype="8-K" isOnlyDei="true" original="d937976d8k.htm">d937976d8k.htm</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="22">http://xbrl.sec.gov/dei/2025</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>false</HasCalculationLinkbase>
</FilingSummary>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>JSON
<SEQUENCE>14
<FILENAME>MetaLinks.json
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
{
 "version": "2.2",
 "instance": {
  "d937976d8k.htm": {
   "nsprefix": "advm",
   "nsuri": "http://www.adverum.com/20250922",
   "dts": {
    "schema": {
     "local": [
      "advm-20250922.xsd"
     ],
     "remote": [
      "http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xl-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xlink-2003-12-31.xsd",
      "http://www.xbrl.org/2005/xbrldt-2005.xsd",
      "http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd",
      "http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd",
      "https://www.xbrl.org/dtr/type/2024-01-31/types.xsd",
      "https://xbrl.sec.gov/dei/2025/dei-2025.xsd",
      "https://xbrl.sec.gov/naics/2025/naics-2025.xsd"
     ]
    },
    "labelLink": {
     "local": [
      "advm-20250922_lab.xml"
     ]
    },
    "presentationLink": {
     "local": [
      "advm-20250922_pre.xml"
     ]
    },
    "inline": {
     "local": [
      "d937976d8k.htm"
     ]
    }
   },
   "keyStandard": 22,
   "keyCustom": 0,
   "axisStandard": 0,
   "axisCustom": 0,
   "memberStandard": 0,
   "memberCustom": 0,
   "hidden": {
    "total": 3,
    "http://xbrl.sec.gov/dei/2025": 3
   },
   "contextCount": 1,
   "entityCount": 1,
   "segmentCount": 0,
   "elementCount": 23,
   "unitCount": 0,
   "baseTaxonomies": {
    "http://xbrl.sec.gov/dei/2025": 22
   },
   "report": {
    "R1": {
     "role": "http://www.adverum.com//20250922/taxonomy/role/DocumentDocumentAndEntityInformation",
     "longName": "100000 - Document - Document and Entity Information",
     "shortName": "Document and Entity Information",
     "isDefault": "true",
     "groupType": "document",
     "subGroupType": "",
     "menuCat": "Cover",
     "order": "1",
     "firstAnchor": {
      "contextRef": "duration_2025-09-22_to_2025-09-22",
      "name": "dei:DocumentType",
      "unitRef": null,
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": null,
      "ancestors": [
       "span",
       "p",
       "div",
       "div",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "d937976d8k.htm",
      "first": true,
      "unique": true
     },
     "uniqueAnchor": {
      "contextRef": "duration_2025-09-22_to_2025-09-22",
      "name": "dei:DocumentType",
      "unitRef": null,
      "xsiNil": "false",
      "lang": "en-US",
      "decimals": null,
      "ancestors": [
       "span",
       "p",
       "div",
       "div",
       "body",
       "html"
      ],
      "reportCount": 1,
      "baseRef": "d937976d8k.htm",
      "first": true,
      "unique": true
     }
    }
   },
   "tag": {
    "dei_AmendmentFlag": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "AmendmentFlag",
     "presentation": [
      "http://www.adverum.com//20250922/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Amendment Flag",
        "terseLabel": "Amendment Flag",
        "documentation": "Boolean flag that is true when the XBRL content amends previously-filed or accepted submission."
       }
      }
     },
     "auth_ref": []
    },
    "dei_CityAreaCode": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "CityAreaCode",
     "presentation": [
      "http://www.adverum.com//20250922/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "City Area Code",
        "terseLabel": "City Area Code",
        "documentation": "Area code of city"
       }
      }
     },
     "auth_ref": []
    },
    "dei_CoverAbstract": {
     "xbrltype": "stringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "CoverAbstract",
     "lang": {
      "en-us": {
       "role": {
        "label": "Cover [Abstract]",
        "terseLabel": "Cover [Abstract]",
        "documentation": "Cover page."
       }
      }
     },
     "auth_ref": []
    },
    "dei_DocumentPeriodEndDate": {
     "xbrltype": "dateItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "DocumentPeriodEndDate",
     "presentation": [
      "http://www.adverum.com//20250922/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Document Period End Date",
        "terseLabel": "Document Period End Date",
        "documentation": "For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD."
       }
      }
     },
     "auth_ref": []
    },
    "dei_DocumentType": {
     "xbrltype": "submissionTypeItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "DocumentType",
     "presentation": [
      "http://www.adverum.com//20250922/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Document Type",
        "terseLabel": "Document Type",
        "documentation": "The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'."
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityAddressAddressLine1": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityAddressAddressLine1",
     "presentation": [
      "http://www.adverum.com//20250922/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Address, Address Line One",
        "terseLabel": "Entity Address, Address Line One",
        "documentation": "Address Line 1 such as Attn, Building Name, Street Name"
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityAddressCityOrTown": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityAddressCityOrTown",
     "presentation": [
      "http://www.adverum.com//20250922/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Address, City or Town",
        "terseLabel": "Entity Address, City or Town",
        "documentation": "Name of the City or Town"
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityAddressPostalZipCode": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityAddressPostalZipCode",
     "presentation": [
      "http://www.adverum.com//20250922/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Address, Postal Zip Code",
        "terseLabel": "Entity Address, Postal Zip Code",
        "documentation": "Code for the postal or zip code"
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityAddressStateOrProvince": {
     "xbrltype": "stateOrProvinceItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityAddressStateOrProvince",
     "presentation": [
      "http://www.adverum.com//20250922/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Address, State or Province",
        "terseLabel": "Entity Address, State or Province",
        "documentation": "Name of the state or province."
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityCentralIndexKey": {
     "xbrltype": "centralIndexKeyItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityCentralIndexKey",
     "presentation": [
      "http://www.adverum.com//20250922/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Central Index Key",
        "terseLabel": "Entity Central Index Key",
        "documentation": "A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK."
       }
      }
     },
     "auth_ref": [
      "r1"
     ]
    },
    "dei_EntityEmergingGrowthCompany": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityEmergingGrowthCompany",
     "presentation": [
      "http://www.adverum.com//20250922/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Emerging Growth Company",
        "terseLabel": "Entity Emerging Growth Company",
        "documentation": "Indicate if registrant meets the emerging growth company criteria."
       }
      }
     },
     "auth_ref": [
      "r1"
     ]
    },
    "dei_EntityFileNumber": {
     "xbrltype": "fileNumberItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityFileNumber",
     "presentation": [
      "http://www.adverum.com//20250922/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity File Number",
        "terseLabel": "Entity File Number",
        "documentation": "Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen."
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityIncorporationStateCountryCode": {
     "xbrltype": "edgarStateCountryItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityIncorporationStateCountryCode",
     "presentation": [
      "http://www.adverum.com//20250922/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Incorporation State Country Code",
        "terseLabel": "Entity Incorporation State Country Code",
        "documentation": "Two-character EDGAR code representing the state or country of incorporation."
       }
      }
     },
     "auth_ref": []
    },
    "dei_EntityRegistrantName": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityRegistrantName",
     "presentation": [
      "http://www.adverum.com//20250922/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Registrant Name",
        "terseLabel": "Entity Registrant Name",
        "documentation": "The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC."
       }
      }
     },
     "auth_ref": [
      "r1"
     ]
    },
    "dei_EntityTaxIdentificationNumber": {
     "xbrltype": "employerIdItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "EntityTaxIdentificationNumber",
     "presentation": [
      "http://www.adverum.com//20250922/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Entity Tax Identification Number",
        "terseLabel": "Entity Tax Identification Number",
        "documentation": "The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS."
       }
      }
     },
     "auth_ref": [
      "r1"
     ]
    },
    "dei_LocalPhoneNumber": {
     "xbrltype": "normalizedStringItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "LocalPhoneNumber",
     "presentation": [
      "http://www.adverum.com//20250922/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Local Phone Number",
        "terseLabel": "Local Phone Number",
        "documentation": "Local phone number for entity."
       }
      }
     },
     "auth_ref": []
    },
    "dei_PreCommencementIssuerTenderOffer": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "PreCommencementIssuerTenderOffer",
     "presentation": [
      "http://www.adverum.com//20250922/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Pre Commencement Issuer Tender Offer",
        "terseLabel": "Pre Commencement Issuer Tender Offer",
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act."
       }
      }
     },
     "auth_ref": [
      "r3"
     ]
    },
    "dei_PreCommencementTenderOffer": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "PreCommencementTenderOffer",
     "presentation": [
      "http://www.adverum.com//20250922/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Pre Commencement Tender Offer",
        "terseLabel": "Pre Commencement Tender Offer",
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act."
       }
      }
     },
     "auth_ref": [
      "r5"
     ]
    },
    "dei_Security12bTitle": {
     "xbrltype": "securityTitleItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "Security12bTitle",
     "presentation": [
      "http://www.adverum.com//20250922/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Security 12b Title",
        "terseLabel": "Security 12b Title",
        "documentation": "Title of a 12(b) registered security."
       }
      }
     },
     "auth_ref": [
      "r0"
     ]
    },
    "dei_SecurityExchangeName": {
     "xbrltype": "edgarExchangeCodeItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "SecurityExchangeName",
     "presentation": [
      "http://www.adverum.com//20250922/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Security Exchange Name",
        "terseLabel": "Security Exchange Name",
        "documentation": "Name of the Exchange on which a security is registered."
       }
      }
     },
     "auth_ref": [
      "r2"
     ]
    },
    "dei_SolicitingMaterial": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "SolicitingMaterial",
     "presentation": [
      "http://www.adverum.com//20250922/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Soliciting Material",
        "terseLabel": "Soliciting Material",
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act."
       }
      }
     },
     "auth_ref": [
      "r4"
     ]
    },
    "dei_TradingSymbol": {
     "xbrltype": "tradingSymbolItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "TradingSymbol",
     "presentation": [
      "http://www.adverum.com//20250922/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Trading Symbol",
        "terseLabel": "Trading Symbol",
        "documentation": "Trading symbol of an instrument as listed on an exchange."
       }
      }
     },
     "auth_ref": []
    },
    "dei_WrittenCommunications": {
     "xbrltype": "booleanItemType",
     "nsuri": "http://xbrl.sec.gov/dei/2025",
     "localname": "WrittenCommunications",
     "presentation": [
      "http://www.adverum.com//20250922/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "lang": {
      "en-us": {
       "role": {
        "label": "Written Communications",
        "terseLabel": "Written Communications",
        "documentation": "Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act."
       }
      }
     },
     "auth_ref": [
      "r6"
     ]
    }
   }
  }
 },
 "std_ref": {
  "r0": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Number": "240",
   "Section": "12",
   "Subsection": "b"
  },
  "r1": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Number": "240",
   "Section": "12",
   "Subsection": "b-2"
  },
  "r2": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Number": "240",
   "Section": "12",
   "Subsection": "d1-1"
  },
  "r3": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Number": "240",
   "Section": "13e",
   "Subsection": "4c"
  },
  "r4": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Number": "240",
   "Section": "14a",
   "Subsection": "12"
  },
  "r5": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Exchange Act",
   "Number": "240",
   "Section": "14d",
   "Subsection": "2b"
  },
  "r6": {
   "role": "http://www.xbrl.org/2003/role/presentationRef",
   "Publisher": "SEC",
   "Name": "Securities Act",
   "Number": "230",
   "Section": "425"
  }
 }
}
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>ZIP
<SEQUENCE>15
<FILENAME>0001193125-25-210068-xbrl.zip
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
begin 644 0001193125-25-210068-xbrl.zip
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M]O7JIYAMCG%W,QSW]JI=-_3S%U!+ P04    " !A039;TG[@.V &  "]0P
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MO3>2%X*T$F2EB&Z-M&C#<F^DKI?BCDN]97[O1+:+I[]]0>_Y#U!+ P04
M" !A039;R@VF-K<$  !Y*@  %0   &%D=FTM,C R-3 Y,C)?<')E+GAM;-6:
M78_B-A2&[U?:_^"F-ZW4$,+,= L:=D69F14J\R%@VZHW*Y,<P*IC(]L,\.][
M''!+(,S"=%O%7$!P_!Z_/H_C)$ZN/ZPR3IY!:29%.XAK]8" 2&3*Q+0=+'1(
M=<)80+2A(J5<"F@':]#!A_=OWUQ_$X;DYJ[W0$(R,V:N6U&T7"YKZ80)+?G"
M8$A=2V06D3!T];NC3^3737,M,@ .5 -I7,4-\O."\;35J#>NZN\:C5J\*U)
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M9[Z[<"1$==&]:-N!_!\61ZZC@]3TL<"^,[G98[_L&X!8\A=02P,$%     @
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M6.,T]^MYP7P].!\QGQ*\/<?^"OC3ETQ+N#YS_=P]2&:&6.;J2\9G$[^@ARO
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MD%<;Z87)0EX!<Y+,(E[BP+4;@%@=E:NA2,\=<>+)YF'IA+0NNZ1<*>:AX^8
MYD/.=R'G/;#F%NR"^W -EA#,H;,_(3_^GH5\QB@8VG!J4<(WNHS2$<V5RI'7
MF"E#ZI _4H6-HY6/BGDSXN<$LOS0FKUKS9UDZ!FP<%87.:''E[>#P0OBAJVU
MY^1[UIZ-H@P<S5D)ED8JLLFG;*%Q=JY\V/^\6YTS8WYHW7MJ74>I@,DWT;W3
M#]U[D>Y56.[HT-JM[H5C;JU[6X20FF7<Q2PZ"NGS0LH$CC6A&Y,0_7DKJPW1
M<$3Q'*Q^=?CV4=KQMRCM6#SXW2*MLF(%"SKQJK.Q?1Q%W>.#=T8FQ<!\,FH-
MS3?+H4KMY)3PQ2S\YO@E*>KE>5\6&KWI"+H=JMT<I+X+B_:1;,7RR542Q4(_
M\NY'L)%Y!Q6-:)MY@[2/^E8JQU:F!,*'3TOEOM;F5QR%U#(-1&S")3U?6(_/
M!D\[*E=:M=)0^8S>O7R9-0#%S8M_7;_3\M*XB2"2S?%)SCS(6M_TU#&HE[+I
M7Z1%/>Y3AUQ3^<AB"/B&)0291L>U$6PRTI\22R?J8<1',AXR77PTEQSGBL"J
M ;#BI _D08JQ/T3,ZF'"G"IBLP%W39FQ23\6JV3Q\8K94Q45<H@;<7)F<I!1
M;ZXKE#VL4,:CGBV1;[F?B],\VSW3$<^^'0Q>F"!!9WZ_IW0)&=0G.9E&>_DN
M_/CIM%2#F&G]F7YT\\_ZWI:Y=6^Q7*VT)I9[+M=>%3AT!FL$&$]?EVH#7S@E
M&H*L,P=B#)!U5^B((U!,]P+RPL,H?'T#U]5!YA%FY)>>RYGBY&,.4Z/>N$ ?
MM$CVQ!7<!QI$70MSG=2RL#08.^.+'&PJ;65.H>RUX4[ED,;A3E+L\Z%PQ'NQ
M(@HZ><V9Z-_JL>?4$>G!P5)!+;'1@J#B3PF8T6>P]0 SG#&=*O0>P+2#\V&,
M2" ,%++^J:;_.XO6XTV2H9[E,"K1?0UU,'6PX1QZMP^V'\SGQ+[>=B_:W5SK
M]NJJ>==KUZ,OWT-.K%3:,BFVON2ZX[,15G(42V<G^6)IVW+P-T].K8/29O8N
M>P@<4\=X>4$NN+(<H0+)\N0YF9[C7>"16X"MRQ\MS)*U3V210[1VN!_EXEDK
M]H7E<NGL,^ 6%8#%I& \L<!+@NFF"I;7!'/LQ2?]J4;$.H- NEP-\4[$#T/>
MYSZIU?(E-+G:^[<"*?'QP?#I0K#1B?IHN \P% ,L!.XD?NN'8>IR%II''E_+
MPWM8"W?C%P<A&-/$HL 2%-5DF5%J6=3W(<P+Z?9%%IG09]@MP0I8HQJ"E]>.
MK\\ \X$_M2/6#[C#[)#QVN&!F_*$8KK6(NVF3K=$:5ED/QT9KYK<YF3G:*^S
M<>7\&+PI44'_/S"IV3!&'$[[W#%3Z<DIQ.>&J#R9YQNB(:KA;+B-9GM-*8L5
M@@9D#@MY"-Q"GJ0D(+GU1(\QC0M1S.I#85U]3!]"Y20;]"KGW7LVANTC:@.&
MT4X'.]*!'XZ,S_7JU8A!%O$,( HG+'E$$AZ8RR0 CU2-/W%@@@#L*Y*O FL8
MTI^%=5N@J_H!0RT0?40_6HNP\H;YN/^ <8 %X0.(5IH7B<$6M"(A\:>O/+_Y
M\%5)7W7Z??NJ6RW@;7QH6[V#?[I/*"QU78#G%D)]M"-@ #Q0%86V1J-\!KJF
M+,F8J^O4C.'P^)/ F/]NB$ZF0IK=^_9UIP?1 B)^]D2=@&K$OS$D[4Q$[HE9
M44 *XX]!Y3;>AL('/@Z-4W3KB%K@_R58<F, M-9KEZ'? 6 L8[1JT' PF.@<
M0>.9*X7CX %6?+R26D^XZ($(T!#\%>BGCK&K\>@Z!(*]01B/MHF2@12C)>.8
M24V%'UB9&>>C";A4_MSX)VL][>D>2F<SC1; 96 >E5-R R %<,&#?ACB <L;
MQ_ U=R7$(U[KHGYDG%I#Y8Y$=A&H(-)[;KUEZ X56G6]%"=<BIHM!3<TW)(1
MHV["R]U)_H3.)^';KN##%&("6>AV9]ZN5DU[NQBO&)D1@0^N?,1]?7<V28&,
M.:[=-$3/6,>/HA/J)$X'<\2*F4T*,7KX2+B24IV247!P@>-K/J1$-5)I+;)Y
MTM/>;36OJ$S!$\G5H]($X.026:VYI&T+]A4#+/BS.3Z& //C/>!K\<G K&[O
MLZEP[22DB.O,<>M@C5D]O$Z7@U1-B44Q:1$M!\;#P35\,,56X,6U/AKM,T?2
M>4#;6'3-#>>1!Q31H3;+-H0.@7Y(#ADWH)8O9+@"2P2.G1R9PE2X<B 7MA,V
MA\T!HICZ=3Q$1*:-D0_Q2KP4_'F61H'51^0J%H/'+O";7!H2([P:BNX\ 29]
MH]$+:H\B&N2&U@OQ6KN5MI&V8 8*:DSGTT=F*HKCRF.]>0%<6L")P+/#)SY-
M"LA@Q%6+GJ$\5)!PR<@Z3",EX&LV8HI^P8E*P>(/M/56:*OV?:.MRUB)>FFE
M"\/&;2!8@J+RGLLK=B-[SZBO.#@P%1;ZPRZ$G]O41"S67YC?:Y4WJXG84<'#
M5F*YQ<DXB5[S:UZ!G.L[PGK<^:%Q*+CZ\/]&Y%]P[+_SP_]EN.O-#M;QI2"
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M,S<Y-S9D.&LN:'1M4$L! A0#%     @ 84$V6QCI_F$=#   &24  !$
M         ( !S2   &0Y,S<Y-S9D97@Y.3$N:'1M4$L%!@     %  4 0 $
' !DM      $!

end
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>16
<FILENAME>d937976d8k_htm.xml
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<XML>
<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2025"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="advm-20250922.xsd" xlink:type="simple"/>
    <context id="duration_2025-09-22_to_2025-09-22">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001501756</identifier>
        </entity>
        <period>
            <startDate>2025-09-22</startDate>
            <endDate>2025-09-22</endDate>
        </period>
    </context>
    <dei:SecurityExchangeName
      contextRef="duration_2025-09-22_to_2025-09-22"
      id="Hidden_dei_SecurityExchangeName">NASDAQ</dei:SecurityExchangeName>
    <dei:AmendmentFlag contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-262">false</dei:AmendmentFlag>
    <dei:EntityCentralIndexKey
      contextRef="duration_2025-09-22_to_2025-09-22"
      id="Hidden_dei_EntityCentralIndexKey">0001501756</dei:EntityCentralIndexKey>
    <dei:DocumentType contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-273">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-274">2025-09-22</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-275">Adverum Biotechnologies, Inc.</dei:EntityRegistrantName>
    <dei:EntityIncorporationStateCountryCode contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-276">DE</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-277">001-36579</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-278">20-5258327</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1 contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-279">100 Cardinal Way</dei:EntityAddressAddressLine1>
    <dei:EntityAddressCityOrTown contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-280">Redwood City</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-281">CA</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-282">94063</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-283">(650)</dei:CityAreaCode>
    <dei:LocalPhoneNumber contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-284">656-9323</dei:LocalPhoneNumber>
    <dei:WrittenCommunications contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-285">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-286">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-287">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-288">false</dei:PreCommencementIssuerTenderOffer>
    <dei:Security12bTitle contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-289">Common Stock</dei:Security12bTitle>
    <dei:TradingSymbol contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-290">ADVM</dei:TradingSymbol>
    <dei:EntityEmergingGrowthCompany contextRef="duration_2025-09-22_to_2025-09-22" id="ixv-291">false</dei:EntityEmergingGrowthCompany>
</xbrl>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
