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Marketable securities | 6 Months Ended
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Jun. 30, 2024
Marketable Securities [Abstract] |
Marketable securities | Marketable securities Marketable securities as of June 30, 2024 consisted of the following (in thousands):
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Marketable securities, current: |  |  |  |  |  |  |
Corporate debt securities | $ | 151,683 |  |  | $ | 1 |  |  | $ | (330) |  |  | $ | 151,354 |
U.S. Treasury securities | 27,739 |  |  | — |  |  | (15) |  |  | 27,724 |
U.S. government debt securities | 11,929 |  |  | — |  |  | (23) |  |  | 11,906 |
Marketable securities, non-current: |  |  |  |  |  |  |
Corporate debt securities | 29,360 |  |  | 7 |  |  | (77) |  |  | 29,290 |
U.S. government debt securities | 2,350 |  |  | — |  |  | (3) |  |  | 2,347 |
Total marketable securities, current and non-current | $ | 223,061 |  |  | $ | 8 |  |  | $ | (448) |  |  | $ | 222,621 |
Marketable securities as of December 31, 2023 consisted of the following (in thousands):
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Marketable securities, current: |  |  |  |  |  |  |
Corporate debt securities | $ | 100,903 |  |  | $ | 16 |  |  | $ | (221) |  |  | $ | 100,698 |
U.S. government debt securities | 20,457 |  |  | 14 |  |  | (43) |  |  | 20,428 |
U.S. Treasury securities | 5,965 |  |  | 1 |  |  | — |  |  | 5,966 |
Marketable securities, non-current: |  |  |  |  |  |  |
Corporate debt securities | 27,901 |  |  | 120 |  |  | (14) |  |  | 28,007 |
Total marketable securities, current and non-current | $ | 155,226 |  |  | $ | 151 |  |  | $ | (278) |  |  | $ | 155,099 |
Marketable securities classified as current have maturities of less than one year and are classified as available-for-sale. Marketable securities classified as non-current are those that: (i) have a maturity of greater than one year, and (ii) are not intended to be liquidated within the next twelve months, although these funds are available for use and, therefore, are classified as available-for-sale. No available-for-sale debt securities held as of June 30, 2024 or December 31, 2023 had remaining maturities greater than five years. Based on factors such as historical experience, market data, issuer-specific factors, and current economic conditions, the Company did not record an allowance for credit losses at June 30, 2024 and December 31, 2023, related to these securities.

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 940 -SubTopic 320 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/940-320/tableOfContent Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1403 -Paragraph b -Publisher SEC Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/320/tableOfContent Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-10 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6B Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6B -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6B Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 320 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/942-320/tableOfContent + Details
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