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Cash Equivalents and Investments
 6 Months Ended
Jun. 30, 2023
Investments, Debt and Equity Securities [Abstract]  
Cash Equivalents and Investments CASH EQUIVALENTS AND INVESTMENTS
The following is a summary of the Company’s cash equivalents and investments in debt securities as of June 30, 2023 and December 31, 2022 (in thousands):
June 30, 2023
Amortized Cost BasisUnrealized GainUnrealized Loss Fair Value
Financial Assets
Cash and cash equivalents:
Money market mutual funds$20,450 $— $— $20,450 
Corporate debt securities and commercial paper2,993 — (1)2,992 
Total included in cash and cash equivalents23,443 — (1)23,442 
Investments:
U.S. Treasury securities181,921 137 (71)181,987 
U.S. Government agencies52,550 37 (87)52,500 
Corporate debt securities and commercial paper45,197 55 (43)45,209 
Total included in short-term investments279,668 229 (201)279,696 
Total assets$303,111 $229 $(202)$303,138 
December 31, 2022
Amortized Cost BasisUnrealized GainUnrealized Loss Fair Value
Financial Assets
Cash and cash equivalents:
Money market mutual funds$20,329 $— $— $20,329 
Total included in cash and cash equivalents20,329 — — 20,329 
Investments:
U.S. Treasury securities171,006 1,120 (38)172,088 
U.S. Government agencies
46,777 354 — 47,131 
Corporate debt securities and commercial paper46,576 397 (13)46,960 
Total included in short-term investments264,359 1,871 (51)266,179 
Total assets$284,688 $1,871 $(51)$286,508 
The Company regularly reviews the changes to the rating of its debt securities and reasonably monitors the surrounding economic conditions to assess the risk of expected credit losses. As of June 30, 2023, the risk of expected credit losses was not significant.