v3.23.1
Cover - USD ($)
 12 Months Ended
Dec. 31, 2022
Mar. 27, 2023
Jun. 30, 2022
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2022    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2022    
Current Fiscal Year End Date --12-31    
Entity File Number 001-36199    
Entity Registrant Name PULMATRIX, INC.    
Entity Central Index Key 0001574235    
Entity Tax Identification Number 46-1821392    
Entity Incorporation, State or Country Code DE    
Entity Address, Address Line One 99 Hayden Avenue    
Entity Address, Address Line Two Suite 390    
Entity Address, City or Town Lexington    
Entity Address, State or Province MA    
Entity Address, Postal Zip Code 02421    
City Area Code 781    
Local Phone Number 357-2333    
Title of 12(b) Security Common Stock, par value $0.0001 per share    
Trading Symbol PULM    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 15,546,729
Entity Common Stock, Shares Outstanding   3,652,285  
Documents Incorporated by Reference [Text Block] None    
ICFR Auditor Attestation Flag true    
Auditor Firm ID 688    
Auditor Name Marcum LLP    
Auditor Location New York, NY