Document And Entity Information
Jul. 06, 2022
Document Information [Line Items]  
Entity, Registrant Name ARCH THERAPEUTICS, INC.
Document, Type 8-K
Document, Period End Date Jul. 06, 2022
Entity, Incorporation, State or Country Code NV
Entity, File Number 000-54986
Entity, Tax Identification Number 46-0524102
Entity, Address, Address Line One 235 Walnut Street
Entity, Address, Address Line Two 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
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity, Emerging Growth Company false
Amendment Flag false
Entity, Central Index Key 0001537561