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Document and Entity Information - USD ($)
 12 Months Ended
Sep. 30, 2020
Dec. 07, 2020
Mar. 31, 2020
Document and Entity Information [Abstract]      
Entity Registrant Name NEUROONE MEDICAL TECHNOLOGIES Corp    
Entity Central Index Key 0001500198    
Amendment Flag false    
Document Type 10-K    
Document Period End Date Sep. 30, 2020    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Current Fiscal Year End Date --09-30    
Entity Current Reporting Status Yes    
Entity Well Known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Shell Company false    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Public Float     $ 17,100,000
Entity File Number 000-54716    
Entity Interactive Data Current Yes    
Entity Common Stock, Shares Outstanding   22,993,388  
Entity Incorporation State Country Code DE