Promissory Notes (Details Narrative) - USD ($)		3 Months Ended		6 Months Ended	9 Months Ended
	Feb. 26, 2026	Jun. 30, 2026	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2026	Jun. 30, 2025	Jun. 22, 2026	Apr. 10, 2026	Jan. 05, 2026	Sep. 30, 2025	Apr. 28, 2025
Related Party Transaction [Line Items]
Principal amount		$ 1,003,995			$ 1,003,995
Balance of reverse					1,003,995
Promissory note balance		$ 22,333,167			22,333,167					$ 1,003,995
Letter Agreement description	On February 26, 2026, VisionWave Holdings Inc. (the “Company”) entered into a Letter Agreement (the “Letter Agreement”) with YA II PN, Ltd. (the “Investor”), pursuant to which the Investor agreed to provide the Company with a $20,000,000 senior loan (the “Loan”) on the terms and conditions set forth therein. The Loan is evidenced by a Promissory Note (the “YA II PN Note”) in the original principal amount of $20,000,000, bearing 0% interest per annum (increasing to 18% upon an Event of Default as defined therein). The Note was issued at an original issue discount of 15%, resulting in gross proceeds to the Company of $17,000,000 (prior to deduction of a $25,000 structuring and due diligence fee), or $16,975,000 net cash received.
Amortization payments					$ 2,500,000
Shares issued					1,333,333
Exercise price per share		$ 18.00			$ 18.00						$ 0.001
Amortization of Debt Issuance Costs and Discounts					$ 10,411,665
Legal Fees					25,000
[custom:Warrants-0]		$ 6,986,665			6,986,665
[custom:RepaidOnYaIiPnNote]		8,779,809			9,560,270
Payments of Debt Issuance Costs		12,877	$ 0	$ 6,333,616	4,606,282
promissory notes		22,333,167			22,333,167					1,003,995
Unamortized debt issuance cost		4,078,049			4,078,049					0
Adrian note payment									$ 1,000,000
Repayment of shares issued							876,644
Recognized a loss on disposal					1,432,509
Loss on disposal of investments					552,697
Interest expense		$ 5,230,404			$ 7,565,321
Dream Note								$ 6,000,000
Warrant [Member]
Related Party Transaction [Line Items]
Exercise price per share		$ 9.00			$ 9.00
Evie [Member]
Related Party Transaction [Line Items]
Promissory note balance		$ 1,003,995			$ 1,003,995
Y A I I P N Notes [Member]
Related Party Transaction [Line Items]
Shares issued					1,856,383
promissory notes		6,761,681			$ 6,761,681
Adrian Note [Member]
Related Party Transaction [Line Items]
promissory notes		8,567,491			8,567,491
Interest expense		285,074			564,526
Dream Note [Member]
Related Party Transaction [Line Items]
promissory notes		$ 6,000,000			6,000,000
Interest expense					$ 159,781