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Cash, cash equivalents, and short-term marketable securities | 9 Months Ended
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Sep. 30, 2022
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 September 30, 2022 and 2021.
| Nine Months Ended September 30, 2022 |  | Nine Months Ended September 30, 2021
(in thousands) | Beginning of period |  | End of period |  | Beginning of period |  | End of period
Cash and cash equivalents | $ | 177,947 |  |  | $ | 184,082 |  |  | $ | 255,094 |  |  | $ | 191,707 |
Restricted cash included in other assets, noncurrent | 478 |  |  | 478 |  |  | 321 |  |  | 478 |
Total cash, cash equivalents and restricted cash per statement of cash flows | $ | 178,425 |  |  | $ | 184,560 |  |  | $ | 255,415 |  |  | $ | 192,185 |
Marketable securities The following table summarizes the Company's marketable securities held at September 30, 2022. The Company had no marketable securities as of December 31, 2021.
| September 30, 2022
(in thousands) | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Marketable securities |  |  |  |  |  |  |
U.S. treasury securities | $ | 101,342 |  |  | $ | 4 |  |  | $ | (228) |  |  | $ | 101,118 |
U.S. government agency securities | $ | 4,933 |  |  | $ | — |  |  | $ | (7) |  |  | $ | 4,926 |
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 or maturity of marketable securities during the nine months ended September 30, 2022, and, as a result, the Company did not reclassify any amounts out of accumulated comprehensive loss. As of September 30, 2022, the Company's debt security portfolio consisted of 23 securities that were in an unrealized loss position and had an aggregate fair value of $96.1 million. There were no securities in an unrealized loss position for greater than 12 months as of September 30, 2022. 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 its marketable debt securities for the nine months ended as of September 30, 2022.

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- Definition The entire disclosure of cash, cash equivalents, and debt and equity securities, including any unrealized or realized gain (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI https://asc.fasb.org/topic&trid=2196928 + Details
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- References No definition available. + Details
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