<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2024"
  xmlns:ffd="http://xbrl.sec.gov/ffd/2024"
  xmlns:iso4217="http://www.xbrl.org/2003/iso4217"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xbrldi="http://xbrl.org/2006/xbrldi"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef
      xlink:href="https://xbrl.sec.gov/ffd/2024/ffd-2024.xsd"
      xlink:type="simple"/>
    <context id="C_877290de-25ea-4462-b1e4-badf39caeeb4">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001029142</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>1</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2024-08-06</startDate>
            <endDate>2024-08-06</endDate>
        </period>
    </context>
    <context id="C_1f30d833-f79c-41d0-b342-32f5f4e26325">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001029142</identifier>
        </entity>
        <period>
            <startDate>2024-08-06</startDate>
            <endDate>2024-08-06</endDate>
        </period>
    </context>
    <unit id="U_pure">
        <measure>pure</measure>
    </unit>
    <unit id="U_USD">
        <measure>iso4217:USD</measure>
    </unit>
    <ffd:Securities424iNa
      contextRef="C_1f30d833-f79c-41d0-b342-32f5f4e26325"
      id="F_45872f78-fca5-4381-82f4-691044f494d9">N/A</ffd:Securities424iNa>
    <dei:EntityCentralIndexKey
      contextRef="C_1f30d833-f79c-41d0-b342-32f5f4e26325"
      id="F_d282a420-bbd7-4faa-931d-7adaad6bf08f">0001029142</dei:EntityCentralIndexKey>
    <ffd:PrevslyPdFlg
      contextRef="C_877290de-25ea-4462-b1e4-badf39caeeb4"
      id="F_087ea037-3b58-4d6f-a886-5c29e82fe393">false</ffd:PrevslyPdFlg>
    <ffd:FeeExhibitTp
      contextRef="C_1f30d833-f79c-41d0-b342-32f5f4e26325"
      id="F_2fd8ac02-dd5e-4969-a25c-93d65d5c2606">EX-FILING FEES</ffd:FeeExhibitTp>
    <ffd:FormTp
      contextRef="C_1f30d833-f79c-41d0-b342-32f5f4e26325"
      id="F_420e6940-19e9-49da-85a5-2c692c95a91a">S-8</ffd:FormTp>
    <ffd:SubmissnTp
      contextRef="C_1f30d833-f79c-41d0-b342-32f5f4e26325"
      id="F_0156dbee-44d4-4166-a006-a0f0f337fc3b">S-8</ffd:SubmissnTp>
    <dei:EntityRegistrantName
      contextRef="C_1f30d833-f79c-41d0-b342-32f5f4e26325"
      id="F_8c0f2d67-fde8-4902-9139-35e3d8007208">Dynavax Technologies Corporation</dei:EntityRegistrantName>
    <ffd:OfferingSctyTp
      contextRef="C_877290de-25ea-4462-b1e4-badf39caeeb4"
      id="F_719ca5a6-7fec-4c5f-a2bc-2802e2c304c0">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl
      contextRef="C_877290de-25ea-4462-b1e4-badf39caeeb4"
      id="F_2c3f4644-e9b2-4d7a-995f-cb18f9384c59">Common Stock, $0.001 par value per share, reserved for future grant under the Dynavax Technologies Corporation 2018 Equity Incentive Plan</ffd:OfferingSctyTitl>
    <ffd:FeesOthrRuleFlg
      contextRef="C_877290de-25ea-4462-b1e4-badf39caeeb4"
      id="F_e9cdda1b-da43-4c2e-be42-ceb648b3f850">true</ffd:FeesOthrRuleFlg>
    <ffd:AmtSctiesRegd
      contextRef="C_877290de-25ea-4462-b1e4-badf39caeeb4"
      decimals="0"
      id="F_81035a00-1898-43d2-84e0-b05763010c54"
      unitRef="U_USD">11400000</ffd:AmtSctiesRegd>
    <ffd:MaxOfferingPricPerScty
      contextRef="C_877290de-25ea-4462-b1e4-badf39caeeb4"
      decimals="2"
      id="F_191e4e91-20a1-433a-bc0d-d50e6c395f1e"
      unitRef="U_USD">10.51</ffd:MaxOfferingPricPerScty>
    <ffd:MaxAggtOfferingPric
      contextRef="C_877290de-25ea-4462-b1e4-badf39caeeb4"
      decimals="0"
      id="F_e1c75006-b000-41b9-b756-4bf87c446911"
      unitRef="U_USD">119814000</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="C_877290de-25ea-4462-b1e4-badf39caeeb4"
      decimals="7"
      id="F_86f4d6c3-264c-4d2e-a11c-0a2ca247b748"
      unitRef="U_pure">0.0001476</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="C_877290de-25ea-4462-b1e4-badf39caeeb4"
      decimals="2"
      id="F_d35ae275-e3c2-4787-a7b3-e3c1a8d093ee"
      unitRef="U_USD">17684.55</ffd:FeeAmt>
    <ffd:TtlOfferingAmt
      contextRef="C_1f30d833-f79c-41d0-b342-32f5f4e26325"
      decimals="0"
      id="F_1f85681e-6aa1-42e1-850f-4df9e07731c5"
      unitRef="U_USD">119814000</ffd:TtlOfferingAmt>
    <ffd:TtlFeeAmt
      contextRef="C_1f30d833-f79c-41d0-b342-32f5f4e26325"
      decimals="2"
      id="F_4d899d10-1298-43a6-9d40-e02abbc458e2"
      unitRef="U_USD">17684.55</ffd:TtlFeeAmt>
    <ffd:TtlPrevslyPdAmt
      contextRef="C_1f30d833-f79c-41d0-b342-32f5f4e26325"
      decimals="0"
      id="F_807c0666-6c31-4006-8d39-2654c6e346f0"
      unitRef="U_USD">0</ffd:TtlPrevslyPdAmt>
    <ffd:TtlOffsetAmt
      contextRef="C_1f30d833-f79c-41d0-b342-32f5f4e26325"
      decimals="0"
      id="F_684a0ba0-a05b-47fb-b3cd-b3a2e6d8427d"
      unitRef="U_USD">0</ffd:TtlOffsetAmt>
    <ffd:NetFeeAmt
      contextRef="C_1f30d833-f79c-41d0-b342-32f5f4e26325"
      decimals="2"
      id="F_e4c7e452-0c29-4469-a936-fc2aecbd88dc"
      unitRef="U_USD">17684.55</ffd:NetFeeAmt>
    <ffd:OfferingNote
      contextRef="C_877290de-25ea-4462-b1e4-badf39caeeb4"
      id="F_216e64f6-c51b-4c98-bc3b-5b020d7e7a69">&lt;span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;"&gt;This calculation is made solely for the purpose of determining the registration fee pursuant to the provisions of Rule 457(c) and (h) under the Securities Act. The offering price per share and the aggregate offering price are calculated based on the average of the high and low sale prices per share of the Common Stock as reported on The Nasdaq Capital Market on August 2, 2024, rounded up to the nearest cent.&lt;/span&gt;</ffd:OfferingNote>
</xbrl>
