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INVESTMENTS AND FAIR VALUE MEASUREMENTS (Tables)
 12 Months Ended
Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]  
Schedule of short-term investments
Marketable securities as of December 31, 2021 consisted of the following (in thousands):
December 31, 2021

Cost or Amortized Cost		Unrealized GainsUnrealized LossesFair Value
Mutual funds$50,000 $— $(338)$49,662 
Equity securities38,100 — (1,331)36,769 
Corporate bonds6,996 290 — 7,286 
$95,096 $290 $(1,669)$93,717 
Marketable Securities
As December 31, 2021, marketable securities are classified and reported on our Consolidated Balance Sheets as follows:
December 31, 2021
Marketable Securities (current)Other
Assets, Net
(non-current)		Total
Mutual funds$49,662 $— $49,662 
Equity securities36,769 — 36,769 
Corporate bonds— 7,286 7,286 
$86,431 $7,286 $93,717 
Debt Securities, Available-for-sale The amortized costs and fair value of our marketable debt securities, by contractual maturity, as of December 31, 2021 (in thousands) are as follows:
December 31, 2021
Amortized
Cost		Fair
Value
Less than 1 year$— $— 
1 to 5 years6,996 7,286 
Total$6,996 $7,286 
Derivatives Not Designated as Hedging Instruments These derivative instruments are reported as Other current liabilities on our Consolidated Balance Sheets.
CostUnrealized GainsFair Value
Liabilities
Derivative instruments$6,370 $(103)$6,267 
$6,370 $(103)$6,267 
Realized and Unrealized Gains and Losses From Our Equity Securities and Derivative Instruments
A summary of realized and unrealized gains and losses from our equity securities and derivative instruments are as follows (in thousands):
Years Ended December 31,
20212020
Net unrealized losses recognized on equity investments $(1,669)$— 
Net realized gains recognized on equity investments2,148 — 
Net realized losses recognized on derivative instruments(1,467)— 
Net unrealized gains recognized on derivative instruments103 — 
Total net gains (losses) recognized in interest and other income$(885)$— 
Schedule of financial instruments measured at fair value on recurring basis
Financial instruments measured at fair value on a recurring basis as of December 31, 2021 and 2020 are classified based on the valuation technique in the table below (in thousands):
December 31, 2021
Fair Value Measurements Using
Quoted Prices
 in Active
Markets for
Identical Assets
(Level 1)		Significant
Other
Observable
Inputs
(Level 2)		Significant
Unobservable
Inputs
(Level 3)		Total
Assets:
Mutual funds49,662 49,662 
Equity securities36,769 — — 36,769 
Corporate bonds— 7,286 — 7,286 
Total assets at fair value$86,431 $7,286 $— $93,717 
Liabilities
Derivative instruments$— $6,267 $— $6,267 
Total liabilities at fair value$— $6,267 $— $6,267 
December 31, 2020
Fair Value Measurements Using
Quoted Prices
 in Active
Markets for
Identical Assets
(Level 1)		Significant
Other
Observable
Inputs
(Level 2)		Significant
Unobservable
Inputs
(Level 3)		Total
Assets:
Money market funds$45,614 $— $— $45,614 
Total assets at fair value $45,614 $— $— $45,614