Accrued Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019
Accrued Liabilities [Line Items]
Accrued pre-clinical and clinical trial expenses	$ 2,343	$ 2,014
Accrued compensation and benefits	3,410	1,973
Accrued legal and professional services expenses	226	316
Other	111	256
Total accrued liabilities	$ 6,090	$ 4,559