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FAIR VALUE ACCOUNTING
 6 Months Ended
Jun. 30, 2026
Fair Value Disclosures [Abstract]  
Fair Value Accounting FAIR VALUE ACCOUNTING
Assets and Liabilities Measured at Fair Value on a Recurring Basis
Assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.
Fair value accounting utilizes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets and liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are described, below:
Level 1 – Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities;
Level 2 – Quoted prices in markets that are not active, or inputs that are observable, either directly or indirectly, for substantially the full term of the asset or liability; and
Level 3 – Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable (supported by little or no market activity).
The Company’s financial instruments as of June 30, 2026 and December 31, 2025 include cash, cash equivalents, restricted cash, accounts receivable, accounts payable and current accrued liabilities. These instruments are carried at cost, which approximates fair value due to the short-term maturities of the instruments. Allowances for doubtful accounts are recorded against the accounts receivable balance to estimate net realizable value.
The Company’s investments in marketable equity securities are publicly traded stocks measured at fair value and classified within Level 1 and Level 2 in the fair value hierarchy. Level 1 marketable equity securities use quoted prices for identical assets in active markets, while Level 2 marketable equity securities utilize inputs based upon quoted prices for similar instruments in active markets.
The Company’s investments in marketable debt securities are valued using quoted prices of a pricing service and, as such, are classified within Level 2 of the fair value hierarchy. The Company’s investments accounted for at fair value consisting of common shares are valued using quoted market prices in active markets and, as such, are classified within Level 1 of the fair value hierarchy. The Company’s Advances to the Donald Project JV are accounted as a marketable debt securities and valued
using the discounted cash flow approach. The discounted cash flow approach is an income based valuation approach used to estimate the instrument’s fair value using a range of indicated discount rates between 6.22% to 6.33% and 5.52% to 6.00% for the valuations as of June 30, 2026 and December 31, 2025, respectively, depending on the estimated timing of a positive FID or no positive FID. The indicated discount rate range is based upon significant inputs not observable in the market and thus represents a Level 3 measurement within the fair value hierarchy.
The Company used the discounted cash flow approach, which is an income-based valuation approach, to estimate the fair value of its contingent consideration payment to RadTran using an indicated discount rate of 6.60% as of June 30, 2026 and 5.80% as of December 31, 2025. The indicated discount rate is based on significant inputs not observable in the market, and thus represents a Level 3 measurement within the fair value hierarchy.
The following tables set forth the fair value of the Company’s assets and liabilities measured at fair value on a recurring basis (at least annually) by level within the fair value hierarchy. Assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.
Level 1Level 2Level 3Total
June 30, 2026
Assets
Marketable debt securities$— $855,686 $24,905 $880,591 
Marketable equity securities22,603 49 — 22,652 
Total assets$22,603 $855,735 $24,905 $903,243 
Liabilities
Contingent consideration$— $— $1,767 $1,767 
December 31, 2025
Assets
Marketable debt securities$— $776,332 $10,241 $786,573 
Marketable equity securities20,693 81 — 20,774 
Total assets$20,693 $776,413 $10,241 $807,347 
Liabilities
Contingent consideration$— $— $1,723 $1,723 
Changes in Level 3 Fair Value Measurements
The following table is a reconciliation of the beginning and ending balance recorded for the contingent consideration classified as Level 3 in the fair value hierarchy:
Beginning balance, December 31, 2025$1,723 
Changes in estimated fair value44 
Ending balance, June 30, 2026$1,767 
The following table is a reconciliation of the beginning and ending balance recorded for the Advances to the Donald Project that are classified as Level 3 in the fair value hierarchy:
Balance as of December 31, 2025$10,241 
Additions15,374 
Changes in estimated fair value(710)
Balance as of June 30, 2026$24,905 
The following table presents the fair value and carrying value recorded for the Notes (in thousands):
June 30, 2026December 31, 2025
FairCarryingFairCarrying
Value(1)
Value(2)
Value(1)
Value(2)
Notes$724,920 $677,684 $721,000 $675,688 
(1) Fair values are based on Level 2 market data inputs.
(2) Carrying values are presented net of unamortized debt issuance costs.