Stockholders' Equity - Schedule of Outstanding Warrants (Detail)	6 Months Ended
	Jun. 30, 2026 $ / shares shares
Class of Stock [Line Items]
Outstanding \| shares	32,288,805
Weighted average exercise price \| $ / shares	$ 3
Legacy TuHURA Common Stock Warrants [Member]
Class of Stock [Line Items]
Outstanding \| shares	7,523,933
Weighted average exercise price \| $ / shares	$ 4.58
Legacy TuHURA Common Stock Warrants [Member] \| Minimum [Member]
Class of Stock [Line Items]
Expiration dates	Aug. 01, 2026
Legacy TuHURA Common Stock Warrants [Member] \| Maximum [Member]
Class of Stock [Line Items]
Expiration dates	Apr. 30, 2031
Historical Kintara Common Stock Warrants [Member]
Class of Stock [Line Items]
Outstanding \| shares	10,199
Weighted average exercise price \| $ / shares	$ 757.65
Historical Kintara Common Stock Warrants [Member] \| Minimum [Member]
Class of Stock [Line Items]
Expiration dates	Oct. 01, 2026
Historical Kintara Common Stock Warrants [Member] \| Maximum [Member]
Class of Stock [Line Items]
Expiration dates	Apr. 30, 2027
Common Stock Warrants Issued to Financial Advisor [Member]
Class of Stock [Line Items]
Outstanding \| shares	297,029
Weighted average exercise price \| $ / shares	$ 0.01
Expiration dates	Apr. 30, 2027
PIPE Investors Common Stock Warrants [Member]
Class of Stock [Line Items]
Outstanding \| shares	4,759,309
Weighted average exercise price \| $ / shares	$ 3.31
Expiration dates	Dec. 31, 2030
PIPE Placement Agent Common Stock Warrants [Member]
Class of Stock [Line Items]
Outstanding \| shares	189,616
Weighted average exercise price \| $ / shares	$ 3.31
Expiration dates	Dec. 31, 2030
Bridge Loan Warrants [Member]
Class of Stock [Line Items]
Outstanding \| shares	300,000
Weighted average exercise price \| $ / shares	$ 1.92
Bridge Loan Warrants [Member] \| Minimum [Member]
Class of Stock [Line Items]
Expiration dates	Oct. 31, 2027
Bridge Loan Warrants [Member] \| Maximum [Member]
Class of Stock [Line Items]
Expiration dates	Dec. 31, 2027
RDO Series A Investors Common Stock Warrants [Member]
Class of Stock [Line Items]
Outstanding \| shares	9,462,423
Weighted average exercise price \| $ / shares	$ 1.95
Expiration dates	Jun. 30, 2031
RDO Series B Investors Common Stock Warrants [Member]
Class of Stock [Line Items]
Outstanding \| shares	9,462,423
Weighted average exercise price \| $ / shares	$ 1.95
Expiration dates	Dec. 31, 2027
RDO Placement Agent Common Stock Warrants [Member]
Class of Stock [Line Items]
Outstanding \| shares	283,873
Weighted average exercise price \| $ / shares	$ 2.06
Expiration dates	Dec. 31, 2030