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Cash, cash equivalents, and short-term marketable securities
 3 Months Ended
Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract]  
Cash, cash equivalents, and short-term marketable securities Cash, cash equivalents, and short-term marketable securities
Cash and cash equivalents
The following table summarizes the Company's cash, cash equivalents, and restricted cash as of March 31, 2024 and 2023.
Three Months Ended
March 31, 2024		Three Months Ended
March 31, 2023
(in thousands)Beginning
of period		End
of period		Beginning
of period		End
of period
Cash and cash equivalents$174,561 $75,186 $128,885 $122,825 
Restricted cash included in other assets, noncurrent478 478 478 478 
Total cash, cash equivalents and restricted cash per statement of cash flows$175,039 $75,664 $129,363 $123,303 
Marketable securities
The following tables summarize the Company's marketable securities held at March 31, 2024 and December 31, 2023.
March 31, 2024
(in thousands)Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value
Marketable securities
U.S. treasury securities$108,050 $— $(90)$107,960 
December 31, 2023
(in thousands)Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value
Marketable securities
U.S. treasury securities$29,535 $13 $— $29,548 
U.S. government agency securities4,977 — (2)4,975 
Total$34,512 $13 $(2)$34,523 
All of the Company's marketable securities are due within one year or less. The Company did not realize any gains or losses recognized on the sale of marketable securities during the three months ended March 31, 2024 and 2023, and as a result, the Company did not reclassify any amounts out of accumulated comprehensive loss.
As of March 31, 2024, the Company's debt security portfolio consisted of 15 securities that were in an unrealized loss position and had an aggregate fair value of $103.1 million. There were no securities in an unrealized loss position for greater than 12 months as of March 31, 2024. The unrealized losses on the Company's marketable securities were caused by market interest rate increases. The Company has the intent and ability to hold such securities until recovery. As a result, the Company did not record any charges for credit-related impairments for any debt securities in its portfolio for the three months ended March 31, 2024 and 2023.