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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS
6 Months Ended
Jun. 30, 2023
Fair Value Disclosures [Abstract]  
FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTSMarketable Debt SecuritiesThe Company did not hold any available-for-sale marketable debt securities at June 30, 2023 and December 31, 2022.
Fair Value Measurements
Instruments measured at fair value on a recurring basis
Cash and cash equivalents are measured at fair value and classified within Level 1 and Level 2 in the fair value hierarchy, because we use quoted prices for identical assets in active markets.
The following tables present the Company’s financial instruments that are measured at fair value on a recurring basis:
June 30, 2023
Quoted Market Prices for Identical Assets in Active Markets
(Level 1)
Significant Other Observable Inputs
(Level 2)
Significant Unobservable Inputs
(Level 3)
Total
Fair Value
Measurements
(In thousands)
Assets:
Cash equivalents:
Money market funds$293,434 $— $— $293,434 
December 31, 2022
Quoted Market Prices for Identical Assets in Active Markets
(Level 1)
Significant Other Observable Inputs
(Level 2)
Significant Unobservable Inputs
(Level 3)
Total
Fair Value
Measurements
(In thousands)
Assets:
Cash equivalents:
Money market funds$189,000 $— $— $189,000 
Treasury discount notes— 24,961 — 24,961 
Total$189,000 $24,961 $— $213,961 
Financial instruments measured at fair value only for disclosure purposes
The following table presents the carrying value and the fair value of financial instruments measured at fair value only for disclosure purposes:
June 30, 2023December 31, 2022
Carrying ValueFair ValueCarrying ValueFair Value
(In thousands)
Long-term debt, net (a)
$(495,660)$(405,000)$(495,284)$(368,750)
________________________
(a)    At June 30, 2023 and December 31, 2022, the carrying value of long-term debt, net includes unamortized debt issuance costs of $4.3 million and $4.7 million, respectively.

The fair value of long-term debt is estimated using observable market prices or indices for similar liabilities, which are Level 2 inputs.