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FAIR VALUE ACCOUNTING (Tables)
9 Months Ended
Sep. 30, 2021
Fair Value Disclosures [Abstract]  
Fair Value Measurements, Recurring and Nonrecurring
As of September 30, 2021, 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$3,052 $— $— $3,052 
Marketable equity securities535 — — 535 
$3,587 $— $— $3,587