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FAIR VALUE ACCOUNTING
9 Months Ended
Sep. 30, 2022
Fair Value Disclosures [Abstract]  
Fair Value Accounting FAIR VALUE ACCOUNTING
Assets and liabilities measured at fair value on a recurring basis
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 as of September 30, 2022 and December 31, 2021. As required by accounting guidance, assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.
As of September 30, 2022 and December 31, 2021, the fair values of cash, restricted cash, short-term deposits, receivables, accounts payable and accrued liabilities approximate their carrying values because of the short-term nature of these instruments.
September 30, 2022Level 1Level 2Level 3Total
Cash equivalents(1)
$— $30,137 $— $30,137 
Investments accounted for at fair value22,618 247 — 22,865 
Marketable equity securities329 42 — 371 
Marketable debt securities— 11,254 — 11,254 
$22,947 $41,680 $— $64,627 
(1) Cash equivalents are comprised of United States Treasury Bills and Government Agency Bonds, purchased within three months of their maturity date.

December 31, 2021Level 1Level 2Level 3Total
Investments at fair value37,407 1,131 — 38,538 
Marketable equity securities494 — — 494 
$37,901 $1,131 $— $39,032 
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 investments accounted for at fair value consisting of warrants are valued using the Black-Scholes option model based on observable inputs and as such are classified within Level 2 of the hierarchy.
Investments accounted for at fair value include the Company’s 14.8% investment in Virginia Energy Resources Inc. and its 17.6% investment in CUR. These investments provide the Company with the ability to have significant influence, but not control, over their operations. These investments were valued at $22.87 million as of September 30, 2022 (December 31, 2021- $38.54 million). During the nine months ended September 30, 2022, the Company recognized a loss of $13.72 million related to these investments in Other Income (Loss) in the Condensed Consolidated Statement of Operations and Comprehensive Loss (September 30, 2021- gain of $2.32 million). The fair value of the investments is calculated as the quoted market price of the marketable equity security multiplied by the quantity of shares held by the Company.