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Cash and Cash Equivalents and Investments
 6 Months Ended
Jun. 30, 2023
Cash and Cash Equivalents and Investments [Abstract]  
Cash and Cash Equivalents Disclosure Cash and Cash Equivalents and Investments
The fair value of cash and cash equivalents and investments held at June 30, 2023 and December 31, 2022 are as follows: 
 As of June 30, 2023
 Amortized CostGross Unrealized GainsGross Unrealized LossesEstimated Fair Value
 (in thousands)
Cash and cash equivalents$102,270 $1 $— $102,271 
Securities maturing within one year:    
U.S. treasury securities153,556 9 (108)153,457 
Corporate debt securities1,013 — (2)1,011 
Total short-term investments$154,569 $9 $(110)$154,468 
Total cash and cash equivalents and investments$256,839 $10 $(110)$256,739 
 As of December 31, 2022
 Amortized CostGross Unrealized GainsGross Unrealized LossesEstimated Fair Value
  (in thousands) 
Cash and cash equivalents$46,345 $— $— $46,345 
Securities maturing within one year:    
U.S. treasury securities74,022 — (342)73,680 
Corporate debt securities18,418 — (86)18,332 
Total short-term investments$92,440 $— $(428)$92,012 
Total cash and cash equivalents and investments
$138,785 $— $(428)$138,357 

There were no realized losses during either of the six month periods ended June 30, 2023 and 2022, respectively.