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Cash Equivalents and Marketable Securities | 9 Months Ended
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Sep. 30, 2022
Cash Equivalents and Marketable Securities |
Cash Equivalents and Marketable Securities | 3. Cash Equivalents and Marketable Securities ​ Cash equivalents and marketable securities consisted of the following at September 30, 2022 (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Allowance | ​ | ​ | Gross | ​ | Gross | ​ | ​
​ | ​ | Amortized | ​ | for Credit | ​ | ​ | Unrealized | ​ | Unrealized | ​ | Fair
September 30, 2022 | ​ | Cost | ​ | Losses | ​ | ​ | Gains | ​ | Losses | ​ | Value
Cash equivalents and marketable securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Money market funds | ​ | $ | 210,705 | ​ | $ | — | ​ | ​ | $ | — | ​ | $ | — | ​ | $ | 210,705
Government agency securities | ​ | ​ | 126,455 | ​ | ​ | — | ​ | ​ | ​ | 2 | ​ | ​ | (2,911) | ​ | ​ | 123,546
U.S. Treasuries | ​ | ​ | 68,568 | ​ | ​ | — | ​ | ​ | ​ | 9 | ​ | ​ | (425) | ​ | ​ | 68,152
Commercial paper | ​ | ​ | 42,134 | ​ | ​ | — | ​ | ​ | ​ | — | ​ | ​ | (100) | ​ | ​ | 42,034
Corporate notes/bonds | ​ | ​ | 34,890 | ​ | ​ | — | ​ | ​ | ​ | — | ​ | ​ | (866) | ​ | ​ | 34,024
Total | ​ | $ | 482,752 | ​ | $ | — | ​ | ​ | $ | 11 | ​ | $ | (4,302) | ​ | $ | 478,461
​ Cash equivalents and marketable securities consisted of the following at December 31, 2021 (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Allowance | ​ | ​ | Gross | ​ | Gross | ​ | ​
​ | ​ | Amortized | ​ | for Credit | ​ | ​ | Unrealized | ​ | Unrealized | ​ | Fair
December 31, 2021 | ​ | Cost | ​ | Losses | ​ | ​ | Gains | ​ | Losses | ​ | Value
Cash equivalents and marketable securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Money market funds | ​ | $ | 203,519 | ​ | $ | — | ​ | ​ | $ | — | ​ | $ | — | ​ | $ | 203,519
U.S. Treasuries | ​ | ​ | 124,016 | ​ | ​ | — | ​ | ​ | ​ | 1 | ​ | ​ | (84) | ​ | ​ | 123,933
Government agency securities | ​ | ​ | 126,927 | ​ | ​ | — | ​ | ​ | ​ | — | ​ | ​ | (228) | ​ | ​ | 126,699
Commercial paper | ​ | ​ | 89,699 | ​ | ​ | — | ​ | ​ | ​ | 1 | ​ | ​ | (13) | ​ | ​ | 89,687
Corporate notes/bonds | ​ | ​ | 76,248 | ​ | ​ | — | ​ | ​ | ​ | — | ​ | ​ | (170) | ​ | ​ | 76,078
Total | ​ | $ | 620,409 | ​ | $ | — | ​ | ​ | $ | 2 | ​ | $ | (495) | ​ | $ | 619,916
​ As of September 30, 2022, the Company held three marketable securities that were in a continuous unrealized loss position. The Company neither intends to sell these marketable securities, nor does it believe that it is more-likely-than-not to conclude it will have to sell them before recovery of their carrying values. The Company also believes that it will be able to collect both principal and interest amounts due to it at maturity. Furthermore, the Company has determined that there were no material changes in the credit risk of the debt securities. As of September 30, 2022, the Company holds 25 securities with an aggregate fair value of $58.8 million that had remaining maturities between one and two years. ​ There were no realized gains or losses on available-for-sale securities during the nine months ended September 30, 2022 or 2021.

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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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