General form of registration statement for all companies including face-amount certificate companies

Document And Entity Information

Document And Entity Information
12 Months Ended
Sep. 30, 2022
Document Information [Line Items]  
Document Type S-1/A
Entity Registrant Name ARCH THERAPEUTICS, INC.
Entity Incorporation, State or Country Code NV
Entity Tax Identification Number 46-0524102
Entity Address, Address Line One 235 Walnut St., Suite 6
Entity Address, City or Town Framingham
Entity Address, State or Province MA
Entity Address, Postal Zip Code 01702
City Area Code 617
Local Phone Number 431-2313
Entity Filer Category Non-accelerated Filer
Entity Small Business true
Entity Emerging Growth Company false
Amendment Description This registration statement contains two prospectuses:
Entity Central Index Key 0001537561
Document Fiscal Year Focus 2022
Document Fiscal Period Focus FY
Amendment Flag true