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Cover - USD ($)
 12 Months Ended
Sep. 30, 2025
Dec. 29, 2025
Mar. 31, 2025
Document Type 10-K    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Sep. 30, 2025    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2025    
Current Fiscal Year End Date --09-30    
Entity File Number 001-42741    
Entity Registrant Name VisionWave Holdings, Inc.    
Entity Central Index Key 0002038439    
Entity Tax Identification Number 99-5002777    
Entity Incorporation, State or Country Code DE    
Entity Address, Address Line One 300 Delaware Ave.    
Entity Address, Address Line Two  Suite 210 # 301    
Entity Address, City or Town Wilmington    
Entity Address, State or Province DE    
Entity Address, Postal Zip Code 19801    
City Area Code (302)    
Local Phone Number 305-4790    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
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 Public Float     $ 24,145,849
Entity Common Stock, Shares Outstanding   16,516,603  
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Auditor Firm ID 587    
Auditor Name RBSM LLP    
Auditor Location New York, NY    
Common Stock, par value $0.01 per share      
Title of 12(b) Security Common Stock, par value $0.01 per share    
Trading Symbol VWAV    
Security Exchange Name NASDAQ    
Redeemable Warrants, each whole warrant exercisable for one share of Common Stock at an exercise price of $11.50      
Title of 12(b) Security Redeemable Warrants, each whole warrant exercisable for one share of Common Stock at an exercise price of $11.50    
Trading Symbol VWAVW    
Security Exchange Name NASDAQ