v3.26.1
Document And Entity Information
Jun. 03, 2026
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Jun. 03, 2026
Entity Registrant Name Avalyn Pharma Inc.
Entity Central Index Key 0001540171
Entity Emerging Growth Company true
Entity File Number 001-43251
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 45-2463191
Entity Address, Address Line One 105 W First Street
Entity Address, City or Town Boston
Entity Address, State or Province MA
Entity Address, Postal Zip Code 02127
City Area Code (206)
Local Phone Number 707-0340
Entity Information, Former Legal or Registered Name Not Applicable
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Ex Transition Period false
Title of 12(b) Security Voting Common Stock, par value $0.001 per share
Trading Symbol AVLN
Security Exchange Name NASDAQ