    <SEC-DOCUMENT>0001193125-26-186923-index.html : 20260428
    <SEC-HEADER>0001193125-26-186923.hdr.sgml : 20260428
    <ACCEPTANCE-DATETIME>20260428160511
    ACCESSION NUMBER:		0001193125-26-186923
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		14
    CONFORMED PERIOD OF REPORT:	20260427
    FILED AS OF DATE:		20260428
    DATE AS OF CHANGE:		20260428

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			Bolt Biotherapeutics, Inc.
    		CENTRAL INDEX KEY:			0001641281
    		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
    		ORGANIZATION NAME:           	03 Life Sciences
    		EIN:				472804636
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-39988
    		FILM NUMBER:		26907566

    	BUSINESS ADDRESS:
    		STREET 1:		900 CHESAPEAKE DRIVE
    		CITY:			REDWOOD CITY
    		STATE:			CA
    		ZIP:			94063
    		BUSINESS PHONE:		650-665-9295

    	MAIL ADDRESS:
    		STREET 1:		900 CHESAPEAKE DRIVE
    		CITY:			REDWOOD CITY
    		STATE:			CA
    		ZIP:			94063

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	Bolt Therapeutics, Inc.
    		DATE OF NAME CHANGE:	20150504
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEF 14A
    <SEQUENCE>1
    <FILENAME>bolt-20260424.htm
    <DESCRIPTION>DEF 14A
    <TEXT>
    Document 1 - file: bolt-20260424.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>img117169523_0.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: img117169523_0.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>img117169523_1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: img117169523_1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>img117169523_2.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: img117169523_2.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>5
    <FILENAME>bolt-20260424.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA WITH EMBEDDED LINKBASES DOCUMENT
    <TEXT>
    Document 5 - file: bolt-20260424.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>7
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 7 - file: R1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>8
    <FILENAME>R2.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 8 - file: R2.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>9
    <FILENAME>R3.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 9 - file: R3.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>10
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 10 - file: report.css

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>11
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 11 - file: Show.js

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>13
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 13 - file: FilingSummary.html

    Document 13 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>15
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 15 - file: MetaLinks.json

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>16
    <FILENAME>0001193125-26-186923-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 16 - file: 0001193125-26-186923-xbrl.zip

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>17
    <FILENAME>bolt-20260424_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 17 - file: bolt-20260424_htm.html

    Document 17 - RAW XML: bolt-20260424_htm.xml

    </DOCUMENT>
    </SEC-DOCUMENT>