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INVESTMENTS AND FAIR VALUE MEASUREMENTS (Tables)
 3 Months Ended
Mar. 31, 2022
Investments, Debt and Equity Securities [Abstract]  
Schedule of short-term investments
Marketable securities as of March 31, 2022 and December 31, 2021 consisted of following (in thousands):
March 31, 2022

Cost or Amortized Cost		Unrealized GainsUnrealized LossesFair Value
Mutual funds$40,023 $— $(1,601)$38,422 
Corporate bonds10,651 530 — 11,181 
Equity securities43,039 3,038 (967)45,110 
$93,713 $3,568 $(2,568)$94,713 
December 31, 2021
Cost or Amortized CostUnrealized GainsUnrealized LossesFair Value
Mutual funds$50,000 $— $(338)$49,662 
Corporate bonds6,996 290 — 7,286 
Equity securities38,100 — (1,331)36,769 
$95,096 $290 $(1,669)$93,717 
Marketable Securities
As of March 31, 2022 and December 31, 2021, marketable securities are classified and reported on our Condensed Consolidated Balance Sheets as follows:

March 31, 2022
Marketable Equity Securities Marketable Debt SecuritiesTotal
Mutual funds$38,422 $— $38,422 
Equity securities45,110 — 45,110 
Corporate bonds— 11,181 11,181 
$83,532 $11,181 $94,713 
December 31, 2021
Marketable Equity SecuritiesMarketable Debt SecuritiesTotal
Mutual funds$49,662 $— $49,662 
Equity securities36,769 — 36,769 
Corporate bonds— 7,286 7,286 
$86,431 $7,286 $93,717 
Debt Securities, Available-for-sale The amortized costs and fair value of our marketable debt securities, by contractual maturity, as of March 31, 2022 (in thousands) are as follows:
March 31, 2022
Amortized
Cost		Fair
Value
Less than 1 year$— $— 
1 to 5 years10,651 11,181 
Total$10,651 $11,181 
Derivatives Not Designated as Hedging Instruments These derivative instruments are reported as Other current liabilities on our Condensed Consolidated Balance Sheets as of March 31, 2022 and December 31, 2021 (in thousands).
March 31, 2022
CostUnrealized LossesFair Value
Derivative instruments$8,392 $2,558 $10,950 
$8,392 $2,558 $10,950 
December 31, 2021
CostUnrealized GainsFair Value
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):
Three Months Ended
March 31,
20222021
Net unrealized gains recognized on marketable equity securities $2,140 $— 
Net realized gains recognized on marketable equity securities1,026 — 
Net unrealized losses recognized on derivative instruments(2,661)— 
Net realized loss recognized on derivative instruments(134)— 
Net realized gains recognized on marketable debt securities368 — 
Total net gains recognized in interest and other income (loss), net$739 $— 
Schedule of financial instruments measured at fair value on recurring basis
Financial instruments measured at fair value on a recurring basis as of March 31, 2022 and December 2021 are classified based on the valuation technique in the table below (in thousands):
March 31, 2022
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 funds$38,422 $— $— $38,422 
Equity securities45,110 — — 45,110 
Corporate bonds— 11,181 — 11,181 
Total assets at fair value$83,532 $11,181 $— $94,713 
Liabilities
Derivative instruments$— $10,950 $— $10,950 
Total liabilities at fair value$— $10,950 $— $10,950 

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 funds$49,662 $— $— 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