Balance Sheet Details - Accrued Liabilities (Detail) - USD ($) $ in Thousands		Dec. 31, 2024	Jun. 30, 2024
Accrued Liabilities [Line Items]
Accrued compensation and benefits	[1]	$ 1,476	$ 2,821
Accrued pre-clinical and clinical trial expenses		151	1,407
Accrued legal and professional services		6	33
Accrued reimbursement to KKC		0	892
Other		58	34
Total accrued liabilities		$ 1,691	$ 5,187

[1] Includes employee termination benefits of approximately $1.3 million and $21,000 as of December 31, 2024 and June 30, 2024, respectively, as more fully described in Note 5. Employee Termination Benefits.