XML 14 R1.htm IDEA: XBRL DOCUMENT v3.23.3
Document and Entity Information - shares
 9 Months Ended
Sep. 30, 2023
Nov. 08, 2023
Document and Entity Information    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2023  
Document Transition Report false  
Entity File Number 001-39231  
Entity Registrant Name PASSAGE BIO, INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 82-2729751  
Entity Address, Address Line One One Commerce Square  
Entity Address, Address Line Two 2005 Market Street, 39th Floor  
Entity Address, City or Town Philadelphia  
Entity Address, State or Province PA  
Entity Address, Postal Zip Code 19103  
City Area Code 267  
Local Phone Number 866-0311  
Title of 12(b) Security Common Stock  
Trading Symbol PASG  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   54,819,638
Entity Central Index Key 0001787297  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2023  
Document Fiscal Period Focus Q3  
Amendment Flag false