Share-based Compensation - Fair Value of Stock Options Weighted-Average Assumptions Used (Detail) - $ / shares	9 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	4.50%	2.90%
Expected life (years)	5 years 8 months 12 days	6 years
Volatility	89.80%	84.10%
Dividend yield	0.00%	0.00%
Weighted-average grant date fair value	$ 5.2	$ 7.71