XML 26 R1.htm IDEA: XBRL DOCUMENT v3.21.4
Document and Entity Information - USD ($)
$ in Millions
 12 Months Ended
Sep. 30, 2021
Dec. 27, 2021
Mar. 31, 2021
Document and Entity Information [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Sep. 30, 2021    
Entity File Number 001-34887    
Entity Registrant Name MULLEN AUTOMOTIVE INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 86-3289406    
Entity Address State Or Province CA    
Entity Address, Address Line One 1405 Pioneer Street    
Entity Address, City or Town Brea    
Entity Address, Postal Zip Code 92821    
City Area Code 714    
Local Phone Number 613-1900    
Title of 12(b) Security Common Stock, par value $0.001    
Trading Symbol MULN    
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     $ 47.1
Entity Common Stock, Shares Outstanding   23,383,202  
Entity Central Index Key 0001499961    
Current Fiscal Year End Date --09-30    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Amendment Flag false