XML 7 R1.htm IDEA: XBRL DOCUMENT v3.24.3
Document and Entity Information - shares
 9 Months Ended
Sep. 30, 2024
Oct. 28, 2024
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2024  
Document Fiscal Year Focus 2024  
Document Fiscal Period Focus Q3  
Trading Symbol LRMR  
Entity Registrant Name LARIMAR THERAPEUTICS, INC.  
Entity Central Index Key 0001374690  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Common Stock, Shares Outstanding   63,806,628
Entity Current Reporting Status Yes  
Entity Shell Company false  
Entity File Number 001-36510  
Entity Tax Identification Number 20-3857670  
Entity Address, Address Line One Three Bala Plaza East  
Entity Address, Address Line Two Suite 506  
Entity Address, City or Town Bala Cynwyd  
Entity Address, State or Province PA  
Entity Address, Postal Zip Code 19004  
City Area Code 844  
Local Phone Number 511-9056  
Title of 12(b) Security Common Stock, par value $0.001 per share  
Security Exchange Name NASDAQ  
Entity Interactive Data Current Yes  
Document Quarterly Report true  
Document Transition Report false  
Entity Incorporation State Country Code DE