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Marketable Securities - Investments in debt securities (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Jun. 30, 2025
Investments in Debt Securities |  |  |
Credit loss recognized | $ 0 | $ 0 |
U.S. Treasury Securities |  |  |
Investments in Debt Securities |  |  |
Amortized Cost | 10,136 |  | $ 10,058
Unrealized Gains | 222 |  | 185
Aggregate Fair Value | $ 10,358 |  | $ 10,243

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