Loss Per Share - Schedule of Computation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Dec. 31, 2025	Sep. 30, 2025	Dec. 31, 2024	Sep. 30, 2024	Dec. 31, 2025	Dec. 31, 2024
Numerator:
Net loss	$ (116,006)	$ (20,625)	$ (103,975)	$ (19,663)	$ (136,631)	$ (123,638)
Denominator:
Basic weighted average shares outstanding (shares)	90,655		90,132		90,482	89,997
Diluted weighted average shares outstanding (shares)	90,655		90,132		90,482	89,997
Basic net loss per common share (USD per share)	$ (1.28)		$ (1.15)		$ (1.51)	$ (1.37)
Diluted net loss per common share (USD per share)	$ (1.28)		$ (1.15)		$ (1.51)	$ (1.37)