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Investment In Unconsolidated Entities - Additional Information (Detail) |  |  | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jul. 03, 2023 shares | Jun. 04, 2023 USD ($) shares | Jun. 30, 2025 USD ($) | Jun. 30, 2024 USD ($) | Mar. 31, 2017 shares | Jun. 30, 2025 USD ($) | Jun. 30, 2024 USD ($) | Dec. 31, 2012 shares | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($)
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Investment carrying value |  |  | $ 9,837,828 |  |  | $ 9,837,828 |  |  | $ 9,885,779 |
Equity method investment realized gain loss on disposal |  |  | $ (249,244) | $ (133,419) |  | (318,108) | $ (347,365) |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Contribution agreement equity interests issued or issuable number of additional shares issued value |  |  |  |  |  | $ 10,000,000 |  |  |  |
Ocean Minerals, LLC [Member] |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of issued and outstanding membership owned |  |  | 0.07 |  |  | 0.07 |  |  | 0.07 |
Investment carrying value |  |  | $ 4,600,000 |  |  | $ 4,600,000 |  |  | $ 4,900,000 |
Assumption of changes in put option liability |  |  | 0 | 1,000,000 |  | 0 | (200,000) |  |  |
Equity method investment realized gain loss on disposal |  |  | $ (200,000) | $ (100,000) |  | $ (300,000) | $ (300,000) |  |  |
Ocean Minerals, LLC [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of shares held by the company |  |  | 3.00% |  |  | 3.00% |  |  |  |
Ocean Minerals, LLC [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of shares held by the company |  |  | 5.00% |  |  | 5.00% |  |  |  |
Odyssey Minerals Cayman Limited [Member] | Unit Purchase Agreement [Member] | Ocean Minerals, LLC [Member] |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Units sold to purchaser | shares |  | 733,497 |  |  |  |  |  |  |  |
Purchase price |  | $ 15,000,000 |  |  |  |  |  |  |  |
Percentage of issued and outstanding membership interest units purchased |  | 15.00% |  |  |  |  |  |  |  |
Initial closing purchased units issued | shares | 293,399 |  |  |  |  |  |  |  |  |
Neptune Minerals, Inc. [Member] |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Ownership percentage |  |  | 14.00% |  |  | 14.00% |  |  |  |
Loss from unconsolidated entity |  |  | $ 21,300,000 |  |  | $ 21,300,000 |  |  |  |
Neptune Minerals, Inc. [Member] | Common Class A [Member] |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Investment carrying value |  |  | $ 0 |  |  | $ 0 |  |  |  |
Chatham Rock Phosphate, Limited [Member] |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Investment carrying value |  |  |  |  |  |  |  |  |  | $ 0
Ownership percentage |  |  | 1.00% |  |  | 1.00% |  |  |  |
Deep sea mining exploratory services |  |  |  |  |  | $ 1,700,000 |  |  |  |
Shares received from CRP | shares |  |  |  |  | 141,884 |  |  | 9,320,348 |  |
Outstanding equity stake in CRP |  |  |  |  | 1.00% |  |  |  |  |

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