Fair value measurement - Schedule of the Company's Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Assets:
Available-for-sale securities:	$ 88,673	$ 87,139
Assets	113,988	121,363
U.S. government securities
Assets:
Available-for-sale securities:	19,549	20,749
Corporate debt securities
Assets:
Available-for-sale securities:	55,690	51,880
Other debt securities
Assets:
Available-for-sale securities:	13,434	14,510
Convertible promissory note
Assets:
Available-for-sale securities:	2,983	2,983
Level 1
Assets:
Assets	47,573	58,690
Level 1 | U.S. government securities
Assets:
Available-for-sale securities:	19,549	20,749
Level 1 | Corporate debt securities
Assets:
Available-for-sale securities:	5,692	6,700
Level 1 | Other debt securities
Assets:
Available-for-sale securities:	0	0
Level 1 | Convertible promissory note
Assets:
Available-for-sale securities:	0	0
Level 2
Assets:
Assets	63,432	59,690
Level 2 | U.S. government securities
Assets:
Available-for-sale securities:	0	0
Level 2 | Corporate debt securities
Assets:
Available-for-sale securities:	49,998	45,180
Level 2 | Other debt securities
Assets:
Available-for-sale securities:	13,434	14,510
Level 2 | Convertible promissory note
Assets:
Available-for-sale securities:	0	0
Level 3
Assets:
Assets	2,983	2,983
Level 3 | U.S. government securities
Assets:
Available-for-sale securities:	0	0
Level 3 | Corporate debt securities
Assets:
Available-for-sale securities:	0	0
Level 3 | Other debt securities
Assets:
Available-for-sale securities:	0	0
Level 3 | Convertible promissory note
Assets:
Available-for-sale securities:	2,983	2,983
Money market accounts
Assets:
Cash equivalents:	22,332	31,241
Money market accounts | Level 1
Assets:
Cash equivalents:	22,332	31,241
Money market accounts | Level 2
Assets:
Cash equivalents:	0	0
Money market accounts | Level 3
Assets:
Cash equivalents:	$ 0	$ 0