Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements

Fair Value Measurements
9 Months Ended
Sep. 30, 2022
Fair Value Disclosures [Abstract]  
Fair Value Measurements Fair Value Measurements
The Company's financial instruments consist primarily of cash and cash equivalents, short-term investments, accounts receivable, accounts payable and accrued liabilities. The carrying value of accounts receivable, accounts payable and accrued liabilities approximate their fair value because of their short-term nature. Estimated fair value of available-for-sale securities are generally based on prices obtained from commercial pricing services.
In connection with measuring the fair value of its assets and liabilities, the Company seeks to maximize the use of observable inputs (market data obtained from sources independent from the Company) and to minimize the use of unobservable inputs (the
Company’s assumptions about how market participants would price assets and liabilities). As a basis for considering such assumptions, a three-tier fair value hierarchy has been established, which prioritizes the inputs used in measuring fair value as follows:
Level 1 - Observable inputs such as quoted prices (unadjusted) in active markets for identical assets or liabilities.
Level 2 - Inputs other than quoted prices that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active.
Level 3 - Unobservable inputs that reflect the reporting entity’s own assumptions.
The following table summarizes the financial assets (cash, cash equivalents, restricted cash and short-term investments) measured at fair value on a recurring basis:
September 30, 2022
(in thousands) Level 1 Level 2 Level 3 Total
Financial assets:
Cash, cash equivalents and restricted cash $ 86,052  $   $   $ 86,052 
U.S. agency security   4,904    4,904 
Corporate bond   98,068    98,068 
Commercial paper 112,633      112,633 
Treasury bill   26,704    26,704 
Treasury bond   44,553    44,553 
Yankee bond   3,730    3,730 
Total financial assets $ 198,685  $ 177,959  $   $ 376,644 
December 31, 2021
(in thousands) Level 1 Level 2 Level 3 Total
Financial assets:
Cash, cash equivalents and restricted cash $ 231,900  $ —  $ —  $ 231,900 
Certificates of deposit —  3,140  —  3,140 
Corporate bond —  21,820  —  21,820 
Commercial paper 206,724  —  —  206,724 
Treasury bill —  2,494  —  2,494 
Total financial assets $ 438,624  $ 27,454  $ —  $ 466,078 
The Company's Level 1 instruments include cash, cash equivalents, restricted cash and commercial paper that are valued using quoted market prices. We estimate the fair values of our investments in corporate debt securities, government and government related securities and certificates of deposits by taking into consideration valuations obtained from third-party pricing services. The fair value of our short-term investments classified within Level 2 is based upon observable inputs that may include benchmark yield curves, reported trades, issuer spreads, benchmark securities and reference data including market research publications. At September 30, 2022, and December 31, 2021, the weighted average remaining contractual maturities of our Level 1 and 2 investments were approximately for 7 months and 8 months, respectively. These investments have an overall rating of A-1, or higher, by Moody’s, Standard & Poor’s and Fitch.
No credit loss allowance was recorded as of September 30, 2022, as we do not believe the unrealized loss is a result of a credit loss due to the nature of our investments. We also considered the current and expected future economic and market conditions and determined that the estimate of credit losses was not significantly impacted.
Refer to Note 4, “Cash, Cash Equivalents, Restricted Cash and Short-Term Investments,” for the carrying amount and related unrealized gains (losses) by type of investment.