Business Combinations, Gain on bargain purchase (Details) - USD ($) $ in Thousands |
12 Months Ended | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Aug. 30, 2025 |
Aug. 29, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2024 |
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| Gain on bargain purchase [Abstract] | |||||||||||||||||
| Total consideration transferred | $ 201,791 | ||||||||||||||||
| Settlement of pre-existing contractual arrangement | (137,000) | ||||||||||||||||
| Fair value of identifiable net assets | (29,937) | ||||||||||||||||
| Gain on bargain purchase | (33,109) | $ (33,109) | [1] | $ 0 | [1],[2] | $ 0 | [1],[2] | ||||||||||
| Sayona Quebec Inc [Member] | |||||||||||||||||
| Gain on bargain purchase [Abstract] | |||||||||||||||||
| Buy-out of non-controlling interest in Sayona Quebec | $ (67,963) | [3] | $ (37,800) | ||||||||||||||
| Purchase price allocation [Abstract] | |||||||||||||||||
| Ownership interest | 75.00% | 100.00% | [4] | 75.00% | [4] | 75.00% | [4] | ||||||||||
| Percentage of non-controlling interest | 25.00% | ||||||||||||||||
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