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FAIR VALUE ACCOUNTING (Tables)
6 Months Ended
Jun. 30, 2022
Fair Value Disclosures [Abstract]  
Fair Value Measurements, Recurring and Nonrecurring
As of June 30, 2022, the fair values of cash and cash equivalents, restricted cash, short-term deposits, receivables, accounts payable and accrued liabilities approximate their carrying values because of the short-term nature of these instruments.
Level 1Level 2Level 3Total
Investments at fair value$21,043 $259 $— $21,302 
Marketable equity securities355 — — 355 
Marketable debt securities— 11,440 — 11,440 
$21,398 $11,699 $— $33,097