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FAIR VALUE ACCOUNTING
 6 Months Ended
Jun. 30, 2025
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, 2025 and December 31, 2024 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 Advance to the Donald Project JV is accounted for as a marketable debt security and is valued using the discounted cash flow approach. The discounted cash flow approach is an income statement technique used to estimate the instrument's fair value using a range of indicated discount rate of 4.96% to 5.47%, depending on the estimated timing a positive FID or no positive FID. The indicated discount rate range is based on significant inputs not observable in the market, and thus represents a Level 3 measurement within the fair value heirarchy.
The Company used the discounted cash flow approach, which is an income statement technique, to estimate the fair value of the its contingent consideration payment to RadTran using an indicated discount rate of 10.2%, as of the acquisition date, August 16, 2024, 7.7% as of December 31, 2024 and 10.3% as of June 30, 2025, which 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, 2025
Assets
Cash equivalents(1)
$— $5,000 $— $5,000 
Marketable debt securities— 109,933 7,993 117,926 
Marketable equity securities16,401 77 — 16,478 
Total assets$16,401 $115,010 $7,993 $139,404 
Liabilities
Contingent consideration$— $— $1,709 $1,709 
December 31, 2024
Assets
Marketable debt securities$— $64,065 $— $64,065 
Marketable equity securities16,718 71 — 16,789 
$16,718 $64,136 $— $80,854 
Liabilities
Contingent consideration$— $— $1,764 $1,764 
(1)     Cash and cash equivalents are comprised of U.S. Treasury Bills, Government Agency Bonds, U.S. Non-Redeemable Term Deposits and mutual funds purchased within three months of their maturity date.
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, 2024$1,764 
Revision of estimate(55)
Ending balance, June 30, 2025$1,709