v3.25.1
Document And Entity Information - shares
 6 Months Ended
Mar. 31, 2025
May 15, 2025
Document Information [Line Items]    
Entity Central Index Key 0001499961  
Entity Registrant Name MULLEN AUTOMOTIVE INC.  
Amendment Flag false  
Current Fiscal Year End Date --09-30  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2025  
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2025  
Document Transition Report false  
Entity File Number 001-34887  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 86-3289406  
Entity Address, Address Line One 1405 Pioneer Street  
Entity Address, City or Town Brea  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 92821  
City Area Code 714  
Local Phone Number 613‑1900  
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 Common Stock, Shares Outstanding   44,450,738
Rights [Member]    
Document Information [Line Items]    
Title of 12(b) Security Rights to Purchase Series A-1 Junior Participating Preferred Stock  
Common Stock [Member]    
Document Information [Line Items]    
Title of 12(b) Security Common Stock, par value $0.001  
Trading Symbol MULN  
Security Exchange Name NASDAQ