Business combinations - Proforma Information (Details) - USD ($) |
3 Months Ended | 5 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|---|
Jun. 01, 2023 |
Sep. 30, 2023 |
Sep. 30, 2022 |
May 31, 2023 |
Sep. 30, 2023 |
Sep. 30, 2022 |
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| Merger with TCR2 Therapeutics Inc. | ||||||
| Gain on bargain purchase | $ 22,049,000 | |||||
| Share-based compensation expense | $ 3,183,000 | $ 3,663,000 | 8,696,000 | $ 14,294,000 | ||
| TCR2 Therapeutics | ||||||
| Merger with TCR2 Therapeutics Inc. | ||||||
| Revenue | 60,050 | 16,120 | ||||
| Net loss | (129,684) | (214,680) | ||||
| Acquisition-related costs incurred by TCR2 | 9,000,000.0 | |||||
| Gain on bargain purchase | $ 22,049,000 | 22,000,000.0 | ||||
| Acquisition-related costs | $ 7,346,000 | |||||
| Share-based compensation expense | $ 1,000,000.0 | $ 8,700,000 | ||||
| X | ||||||||||
- Definition This element represents acquisition-related costs incurred by the acquiree. No definition available.
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| X | ||||||||||
- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition In a business combination in which the amount of net identifiable assets acquired and liabilities assumed exceeds the aggregate consideration transferred or to be transferred (as defined), this element represents the amount of gain recognized by the entity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Details
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