Annual report pursuant to Section 13 and 15(d)

Document And Entity Information

v2.4.0.8
Document And Entity Information (USD $)
12 Months Ended
Sep. 30, 2014
Dec. 10, 2014
Document Information [Line Items]    
Document Type 10-K  
Amendment Flag false  
Document Period End Date Sep. 30, 2014  
Document Fiscal Year Focus 2014  
Document Fiscal Period Focus FY  
Entity Registrant Name Arch Therapeutics, Inc.  
Entity Central Index Key 0001537561  
Current Fiscal Year End Date --09-30  
Entity Well-known Seasoned Issuer No  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes  
Entity Filer Category Smaller Reporting Company  
Entity Public Float $ 18,000,000  
Trading Symbol ARTH  
Entity Common Stock, Shares Outstanding   76,076,487