Cover - USD ($)	12 Months Ended
Cover - USD ($)	Dec. 31, 2024	Mar. 30, 2025	Jun. 30, 2024
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Transition Report	false
Document Financial Statement Error Correction [Flag]	false
Entity Interactive Data Current	Yes
ICFR Auditor Attestation Flag	false
Amendment Flag	false
Document Period End Date	Dec. 31, 2024
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	FY
Entity Information [Line Items]
Entity Registrant Name	Tavia Acquisition Corp.
Entity Central Index Key	0002020385
Entity File Number	001-42430
Entity Tax Identification Number	00-0000000
Entity Incorporation, State or Country Code	E9
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Shell Company	true
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Public Float			$ 0
Entity Contact Personnel [Line Items]
Entity Address, Address Line One	850 Library Avenue
Entity Address, Address Line Two	Suite 204
Entity Address, City or Town	Newark
Entity Address, State or Province	DE
Entity Address, Postal Zip Code	19711
Entity Phone Fax Numbers [Line Items]
City Area Code	(212)
Local Phone Number	506-6298
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding		15,920,833
Units, each consisting of one Ordinary Share and one Right
Entity Listings [Line Items]
Title of 12(b) Security	Units, each consisting of one Ordinary Share and one Right
Trading Symbol	TAVIU
Security Exchange Name	NASDAQ
Ordinary shares, par value $0.0001 per share
Entity Listings [Line Items]
Title of 12(b) Security	Ordinary shares, par value $0.0001 per share
Trading Symbol	TAVI
Security Exchange Name	NASDAQ
Rights, each Right to acquire one-tenth (1/10) of one Ordinary Share
Entity Listings [Line Items]
Title of 12(b) Security	Rights, each Right to acquire one-tenth (1/10) of one Ordinary Share
Trading Symbol	TAVIR
Security Exchange Name	NASDAQ

Tavia Acquisition Corp. 10-K