Summary of Significant Accounting Policies - Reconciliation of Class A ordinary shares (Details) - CIK_0001843477_Spring Valley Acquisition Corp. II - USD ($) |
12 Months Ended | |||||
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Oct. 15, 2025 |
Oct. 18, 2024 |
Sep. 30, 2024 |
Jan. 10, 2024 |
Dec. 31, 2025 |
Dec. 31, 2024 |
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| Summary of Significant Accounting Policies | ||||||
| Waiver of deferred underwriting fees | $ 8,000,000 | $ 5,200,000 | $ 8,050,000 | |||
| Class A ordinary shares subject to possible redemption | ||||||
| Summary of Significant Accounting Policies | ||||||
| Common stock subject to possible redemption, November 30, 2024 | $ 25,554,084 | 249,254,022 | ||||
| Redemption | $ 1,801.43 | $ 90,726,471 | (1,801) | (232,811,894) | ||
| Waiver of deferred underwriting fees | 8,050,000 | |||||
| Adjustment for accretion of Class A ordinary shares subject to possible redemption | 1,063,694 | (438,044) | ||||
| Adjustment for Contributions under promissory note | 1,500,000 | |||||
| Common stock subject to possible redemption, November 30, 2025 | $ 26,615,977 | $ 25,554,084 | ||||
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- Definition Amount of Adjustment for Contributions No definition available.
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- Definition Amount of deferred underwriting commission waived during the period. No definition available.
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- Definition Redemption of temporary equity. No definition available.
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- Definition Amount of decrease to net income for accretion of temporary equity to its redemption value to derive net income apportioned to common stockholders. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Carrying amount, attributable to parent, of an entity's issued and outstanding stock which is not included within permanent equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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