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Fair value measurements (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Assets, Fair Value Disclosure [Abstract] |  |
Marketable securities | $ 76,303 | $ 34,523
U.S. treasury securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Marketable securities | 76,303 | 29,548
U.S. government agency securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Marketable securities |  | 4,975
Recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents |  | 115,538
Marketable securities |  | 34,523
Recurring basis | Money market funds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 43,638 | 90,649
Recurring basis | U.S. treasury securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents |  | 24,889
Marketable securities | 76,303 | 29,548
Recurring basis | U.S. government agency securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Marketable securities |  | 4,975
Recurring basis | Quoted Prices in Active Markets (Level 1) |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents |  | 115,538
Marketable securities |  | 29,548
Recurring basis | Quoted Prices in Active Markets (Level 1) | Money market funds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 43,638 | 90,649
Recurring basis | Quoted Prices in Active Markets (Level 1) | U.S. treasury securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents |  | 24,889
Marketable securities | 76,303 | 29,548
Recurring basis | Quoted Prices in Active Markets (Level 1) | U.S. government agency securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Marketable securities |  | 0
Recurring basis | Significant Other Observable Inputs (Level 2) |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents |  | 0
Marketable securities |  | 4,975
Recurring basis | Significant Other Observable Inputs (Level 2) | Money market funds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 0 | 0
Recurring basis | Significant Other Observable Inputs (Level 2) | U.S. treasury securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents |  | 0
Marketable securities | 0 | 0
Recurring basis | Significant Other Observable Inputs (Level 2) | U.S. government agency securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Marketable securities |  | 4,975
Recurring basis | Significant Unobservable Inputs (Level 3) |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents |  | 0
Marketable securities |  | 0
Recurring basis | Significant Unobservable Inputs (Level 3) | Money market funds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 0 | 0
Recurring basis | Significant Unobservable Inputs (Level 3) | U.S. treasury securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents |  | 0
Marketable securities | $ 0 | 0
Recurring basis | Significant Unobservable Inputs (Level 3) | U.S. government agency securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Marketable securities |  | $ 0

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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479130/326-30-45-1 + Details
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