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Fair Value of Financial Instruments
3 Months Ended
Mar. 31, 2022
Fair Value Disclosures [Abstract]  
Fair Value of Financial Instruments
Note 11— Fair Value of Financial Instruments
The following tables present the carrying amount and estimated fair value of our financial instruments recognized at fair value on a recurring basis:
March 31, 2022
Estimated Fair Value Measurements
Carrying AmountQuoted Prices in Active Markets (Level 1)Significant Other Observable Inputs
(Level 2)
Significant Unobservable Inputs
(Level 3)
Assets -
Marketable securities$7,124 $7,124 $— $— 
December 31, 2021
Estimated Fair Value Measurements
Carrying AmountQuoted Prices in Active Markets (Level 1)Significant Other Observable Inputs
(Level 2)
Significant Unobservable Inputs
(Level 3)
Assets -
Marketable securities$7,645 $7,645 $— $— 
Our cash, cash equivalents and restricted cash, accounts receivable, marketable securities and accounts payable are by their nature short-term. As a result, the carrying values included in our Condensed Consolidated Balance Sheets approximate fair value. See “Note 6— Debt” for information regarding the fair value of our debt.