Description of Business and Basis of Presentation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands				12 Months Ended
	Dec. 06, 2023	Nov. 06, 2023	Oct. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
Targeted or Tracking Stock, Stock [Line Items]
Unpaid common stock dividend				$ 1.75
Expenses related to an agreement			$ 1,100
Closing agreement date		Nov. 17, 2023
Dividend paid	$ 11,700			$ 11,660	$ 0
Accumulated losses since inception				388,219	$ 405,997
Cash and cash equivalents and short term investments				$ 38,300
Maximum
Targeted or Tracking Stock, Stock [Line Items]
Potential second return of capital			$ 9,330