Investments in Marketable Debt Securities - Cash and Cash Equivalents and Marketable Securities Held (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Jun. 30, 2025
Investments in Marketable Debt Securities
Amortized Cost	$ 120,947	$ 73,758
Gross Unrealized Gains	66	19
Gross Unrealized Losses	(19)	(26)
Fair Value	120,994	73,751
Corporate commercial paper
Investments in Marketable Debt Securities
Amortized Cost	40,438	16,595
Gross Unrealized Gains	16	1
Gross Unrealized Losses	(2)	(8)
Fair Value	40,452	16,588
Obligations of U.S. government agencies
Investments in Marketable Debt Securities
Amortized Cost	1,268	5,447
Gross Unrealized Gains	2
Gross Unrealized Losses		(2)
Fair Value	1,270	5,445
U.S. Treasury obligations
Investments in Marketable Debt Securities
Amortized Cost	1,751	1,485
Gross Unrealized Losses	(1)	(1)
Fair Value	1,750	1,484
Corporate notes and bonds
Investments in Marketable Debt Securities
Amortized Cost	77,490	50,231
Gross Unrealized Gains	48	18
Gross Unrealized Losses	(16)	(15)
Fair Value	$ 77,522	$ 50,234