Income taxes - Income tax rate (Details) |
12 Months Ended | ||
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Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
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| Income Tax Disclosure [Abstract] | |||
| Federal statutory income tax rate | 21.00% | 21.00% | 21.00% |
| State income taxes, net of federal benefit | 18.50% | 13.00% | 7.20% |
| Research and development tax credits | 2.40% | 2.40% | 2.00% |
| Other permanent differences | 2.60% | 0.80% | (0.10%) |
| Change in deferred tax asset valuation allowance | (44.50%) | (37.20%) | (30.10%) |
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- Definition Effective income tax rate reconciliation, change in preferred stock tranche obligation. No definition available.
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- Definition Effective income tax rate reconciliation, other permanent differences. No definition available.
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to research and development expense. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- References No definition available.
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