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Fair value measurements - Fair Value, Assets Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Assets, Fair Value Disclosure [Abstract]
Short-term marketable securities	$ 106,044	$ 0
U.S. treasury securities
Assets, Fair Value Disclosure [Abstract]
Short-term marketable securities	101,118
U.S. government agency securities
Assets, Fair Value Disclosure [Abstract]
Short-term marketable securities	4,926
Recurring basis | Money market funds
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	29,509
Recurring basis | U.S. treasury securities
Assets, Fair Value Disclosure [Abstract]
Short-term marketable securities	101,118
Recurring basis | U.S. government agency securities
Assets, Fair Value Disclosure [Abstract]
Short-term marketable securities	4,926
Recurring basis | Quoted Prices in Active Markets (Level 1) | Money market funds
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	29,509
Recurring basis | Quoted Prices in Active Markets (Level 1) | U.S. treasury securities
Assets, Fair Value Disclosure [Abstract]
Short-term marketable securities	101,118
Recurring basis | Quoted Prices in Active Markets (Level 1) | U.S. government agency securities
Assets, Fair Value Disclosure [Abstract]
Short-term marketable securities	0
Recurring basis | Significant Other Observable Inputs (Level 2) | Money market funds
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	0
Recurring basis | Significant Other Observable Inputs (Level 2) | U.S. treasury securities
Assets, Fair Value Disclosure [Abstract]
Short-term marketable securities	0
Recurring basis | Significant Other Observable Inputs (Level 2) | U.S. government agency securities
Assets, Fair Value Disclosure [Abstract]
Short-term marketable securities	4,926
Recurring basis | Significant Unobservable Inputs (Level 3) | Money market funds
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	0
Recurring basis | Significant Unobservable Inputs (Level 3) | U.S. treasury securities
Assets, Fair Value Disclosure [Abstract]
Short-term marketable securities	0
Recurring basis | Significant Unobservable Inputs (Level 3) | U.S. government agency securities
Assets, Fair Value Disclosure [Abstract]
Short-term marketable securities	$ 0

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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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454

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- Definition

Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(2))
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 45
-Paragraph 1A
-URI https://asc.fasb.org/extlink&oid=123594786&loc=SL75136599-209740

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