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Revenue Recognition (Additional Information) (Details) € in Millions |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 28, 2026 USD ($) | Jan. 11, 2026 USD ($) | Jan. 11, 2026 EUR (€) | Jun. 30, 2025 USD ($) | Oct. 31, 2023 USD ($) | May 31, 2021 USD ($) | Jun. 30, 2026 USD ($) | Jun. 30, 2025 USD ($) | Mar. 31, 2025 USD ($) | Jun. 30, 2026 USD ($) | Jun. 30, 2025 USD ($) | Dec. 31, 2024 USD ($) | Apr. 30, 2026 USD ($) | Jan. 31, 2026 USD ($) | Dec. 31, 2025 USD ($)
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  | $ 31,687,000 | $ 4,833,000 |  | $ 114,915,000 | $ 7,917,000 |  |  |  |
Milestones require payments |  |  |  |  |  |  |  |  | $ 6,000,000 |  |  |  |  |  |
Number of milestones |  |  |  |  |  |  |  |  |  |  |  | two |  |  |
Company is owed in milestone payments |  |  |  | $ 8,000,000 |  |  |  |  |  |  |  |  |  |  |
Accounts receivable |  |  |  |  |  |  | 27,826,000 |  |  | 27,826,000 |  |  |  |  | $ 16,076,000
Contract Assets |  |  |  |  |  |  |  |  |  | $ 0 |  |  |  |  |
Revenue, performance obligation satisfied over time, method used, description |  |  |  |  |  |  |  |  |  | The contract liabilities as of June 30, 2026 of $17.0 million consists of $0.3 million of deferred revenue which will be recognize as product revenue and the remaining $16.7 million are expected to be recognized as revenue as research and development services are provided over the next 3 years, with $8.5 million expected to be recognized within one year |  |  |  |  |
Contract with customer liability revenue recognized |  |  |  |  |  |  |  |  |  | $ 2,600,000 |  |  |  |  |
Capitalized contract cost |  |  |  | $ 1,700,000 |  |  | 2,400,000 | 1,700,000 |  | 2,400,000 | 1,700,000 |  |  |  |
Milestone Payment | $ 3,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
License and Collaboration Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Milestones require payments |  | $ 170,000,000 | € 145.0 |  |  |  |  |  |  |  |  |  |  |  |
License and Collaboration Arrangement Upfront Payment |  | 58,700,000 | 50.0 |  |  |  |  |  |  |  |  |  |  |  |
Milestone Payment |  | $ 30,000 | € 25.0 |  |  |  |  |  |  |  |  |  |  |  |
NK [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Achievement of commercial milestones |  |  |  |  | $ 35,000,000 |  |  |  |  |  |  |  |  |  |
Received a non-refundable upfront cash payment |  |  |  |  | 25,000,000 |  |  |  |  |  |  |  |  |  |
AnHeart [Member] | Innovent [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of NonRefundable Upfront Cash Payment |  |  |  |  |  | $ 12,000,000 |  |  |  |  |  |  |  |  |
Achievement Of Additional Regulatory Milestones |  |  |  |  |  | 17,000,000 |  |  |  |  |  |  |  |  |
Achievement of commercial milestones |  |  |  |  |  | $ 105,000,000 |  |  |  |  |  |  |  |  |
AnHeart [Member] | NK [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Received a non-refundable upfront cash payment |  |  |  |  | $ 40,000,000 |  |  |  |  |  |  |  |  |  |
Product Revenue [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  | 23,200,000 |  |  | 41,700,000 |  |  |  |  |
Product Revenue [Member] | Innovent [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  | 4,400,000 | 800,000 |  | 7,300,000 | 1,600,000 |  |  |  |
Product Revenue [Member] | NK [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  |  |  | 100,000 |  |  |  |  |
License [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  | 8,495,000 | 3,595,000 |  | 73,213,000 | 6,679,000 |  |  |  |
Milestones require payments |  |  |  |  |  |  |  |  |  |  |  | $ 2,000,000 |  |  |
License [Member] | License and Collaboration Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contract Liability |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 58,700,000 |
License [Member] | AnHeart [Member] | NK [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contract Liability |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 21,200,000
Research And Development Service Revenue [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contract with customer liability revenue recognized |  |  |  |  |  |  |  |  |  | 8,500,000 |  |  |  |  |
Deferred revenue |  |  |  |  |  |  | 300,000 |  |  | 300,000 |  |  |  |  |
Paid Amount for global development and commercialization rights |  |  |  |  |  |  |  |  |  |  |  |  | $ 500,000 |  |
Research And Development Service Revenue [Member] | Innovent [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  | 2,000,000 | 2,200,000 |  | 2,600,000 | 4,100,000 |  |  |  |
Research And Development Service Revenue [Member] | NK [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  |  | 200,000 |  | 200,000 | 400,000 |  |  |  |
Research And Development Service Revenue [Member] | AnHeart [Member] | NK [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contract Liability |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,800,000
Research And Development Service Revenue [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contract Liability |  |  |  |  |  |  | 17,000,000 |  |  | 17,000,000 |  |  |  |  |
Research And Development Service Revenue [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contract Liability |  |  |  |  |  |  | 16,700,000 |  |  | 16,700,000 |  |  |  |  |
Royalty Revenue [Member] | Innovent [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  | 1,600,000 | $ 200,000 |  | 3,000,000 | $ 500,000 |  |  |  |
Royalty Revenue [Member] | NK [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  |  |  | $ 500,000 |  |  | $ 800,000 |  |  |  |  |

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