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Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. The significant components of deferred taxes a (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2021
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Income Tax Disclosure [Abstract] |  |  |
Net operating losses available for future periods | $ 11,893 | $ 8,977 |
Mineral interests | 9,477 | 9,477 |
Startup and organizational costs | 2,132 |  |
Research and development costs | 1,060 |  |
Share issuance costs | 446 |  |
Capital losses available for future periods | 419 | 420 |
Other | 36 | 74 |
Total deferred tax assets | 25,463 | 18,948 |
Valuation allowance | (25,463) | (18,948) | $ (17,235)
Net deferred tax assets |  |  |

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319 + Details
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