The Company and Significant Accounting Policies - Government Grants (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | |||
| Government grants, reduction recorded to operating expenses | $ 0.1 | ||
| Government grants, reduction recorded to property, plant and equipment | $ 0.1 | $ 0.7 | $ 1.0 |