v3.26.1
Cover - shares
 6 Months Ended
Mar. 31, 2026
May 14, 2026
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Mar. 31, 2026  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2026  
Current Fiscal Year End Date --09-30  
Entity File Number 001-42595  
Entity Registrant Name Aether Holdings, Inc.  
Entity Central Index Key 0002026353  
Entity Tax Identification Number 35-2818803  
Entity Incorporation, State or Country Code DE  
Entity Address, Address Line One 110 Charlton Street  
Entity Address, Address Line Two Unit RET B  
Entity Address, City or Town New York  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10014  
City Area Code (347)  
Local Phone Number 726-8898  
Title of 12(b) Security Common Stock, par value $0.001 per share  
Trading Symbol ATHR  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Elected Not To Use the Extended Transition Period false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   12,144,730