Stockholders' Equity - Schedule of Stock Option Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Class of Stock [Line Items]
Total compensation expense	$ 2,248	$ 5,276
Research and Development [Member]
Class of Stock [Line Items]
Total compensation expense	601	1,478
General and Administrative [Member]
Class of Stock [Line Items]
Total compensation expense	$ 1,647	$ 3,798