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Collaborative Arrangements and Licensing Agreements, Biogen (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Collaborative Arrangement and Licensing Agreement [Abstract] |  |  |  |  |
Revenue | $ 225,250 | $ 188,411 | $ 344,748 | $ 318,935 |
Biogen [Member] |  |  |  |  |
Collaborative Arrangement and Licensing Agreement [Abstract] |  |  |  |  |
Revenue | 138,159 | $ 97,402 | 197,395 | $ 167,903 |
Deferred contract revenue | $ 241,800 |  | $ 241,800 |  | $ 307,400
Biogen [Member] | Revenue [Member] | Strategic Partner [Member] |  |  |  |  |
Collaborative Arrangement and Licensing Agreement [Abstract] |  |  |  |  |
Concentration percentage | 61.00% | 52.00% | 57.00% | 53.00% |
Biogen [Member] | Minimum [Member] |  |  |  |  |
Collaborative Arrangement and Licensing Agreement [Abstract] |  |  |  |  |
Cumulative payments received | $ 3,900,000 |  | $ 3,900,000 |  |
2013 Strategic Neurology [Member] | QALSODY [Member] |  |  |  |  |
Collaborative Arrangement and Licensing Agreement [Abstract] |  |  |  |  |
Next payment to be achieved | 10,000 |  | 10,000 |  |
Revenue | 20,000 |  |  |  |
2012 Neurology [Member] | ION582 [Member] |  |  |  |  |
Collaborative Arrangement and Licensing Agreement [Abstract] |  |  |  |  |
Revenue | 30,000 |  |  |  |
2012 Neurology [Member] | IONIS-MAPT [Member] |  |  |  |  |
Collaborative Arrangement and Licensing Agreement [Abstract] |  |  |  |  |
Next payment to be achieved | $ 25,000 |  | $ 25,000 |  |

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