Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2023	Mar. 22, 2024	Jun. 30, 2023
Cover [Abstract]
Document Type	10-K/A
Document Annual Report	true
Document Transition Report	false
Entity Interactive Data Current	Yes
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction	false
Amendment Flag	true
Amendment Description	AN2 Therapeutics, Inc. (the “Company”) is filing this Amendment No. 1 on Form 10-K/A (this “Amendment”) to its Annual Report on Form 10-K for the fiscal year ended December 31, 2023 (the “Original Filing”), which was originally filed with the Securities and Exchange Commission on March 29, 2024, solely for the purpose of filing revised versions of Exhibits 31.1 and 31.2 filed with the Original Filing. Revised Exhibits 31.1 and 31.2 include the following certification language that was inadvertently omitted from such exhibits when originally filed: (i) the introductory language in paragraph 4 that refers to the certifying officer’s responsibility for establishing and maintaining internal control over financial reporting for the Company; and (ii) paragraph 4(b) regarding the design of internal control over financial reporting. This Amendment does not reflect events occurring after the date of the filing of the Original Filing or modify or update any of the other disclosures contained therein in any way. Accordingly, the Amendment should be read in conjunction with the Original Filing. This Amendment consists solely of the preceding cover page, this explanatory note, the signature page and the revised certifications filed as exhibits to this Amendment.
Document Period End Date	Dec. 31, 2023
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--12-31
Entity Registrant Name	AN2 Therapeutics, Inc.
Entity Central Index Key	0001880438
Entity File Number	001-41331
Entity Tax Identification Number	82-0606654
Entity Incorporation, State or Country Code	DE
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Address, Address Line One	1800 El Camino Real
Entity Address, Address Line Two	Suite D
Entity Address, City or Town	Menlo Park
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94027
City Area Code	650
Local Phone Number	331-9090
Title of 12(b) Security	Common Stock
Trading Symbol	ANTX
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		29,770,375
Entity Public Float			$ 108,668,174