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Mineral Rights and Properties, Net (Tables) | 3 Months Ended
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Sep. 30, 2023
Mineral Properties, Net [Abstract] |
Summary of Mineral Rights and Properties | Mineral rights and properties, net consisted of the following.
|  | September 30, |  |  | June 30, |
|  | 2023 |  |  | 2023 |
|  | (in thousands) |
Mineral properties |  | $ | 6,733 |  |  | $ | 6,733 |
Hydrology wells |  |  | 547 |  |  |  | 547 |
Asset retirement cost, net of accumulated amortization of $28 and $23 at September 30, 2023 and June 30, 2023, respectively (1) |  |  | 352 |  |  |  | 357 |
Mineral rights and properties, net |  | $ | 7,632 |  |  | $ | 7,637 |
(1) Asset retirement costs represent the carrying value of capitalized costs associated with asset retirement obligations discussed in Note 5.

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