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Collaborative Arrangements and Licensing Agreements, Biogen (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Oct. 31, 2023 | Sep. 30, 2023 | Jun. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022
Collaborative Arrangement and Licensing Agreement [Abstract] |  |  |  |  |  |  |
Revenue |  | $ 144,207 |  | $ 159,767 | $ 463,142 | $ 435,478 |
Biogen [Member] |  |  |  |  |  |  |
Collaborative Arrangement and Licensing Agreement [Abstract] |  |  |  |  |  |  |
Revenue |  | 94,695 |  | $ 88,959 | 262,599 | $ 259,713 |
Deferred contract revenue |  | $ 316,800 |  |  | $ 316,800 |  | $ 351,200
Biogen [Member] | Revenue [Member] | Strategic Partner [Member] |  |  |  |  |  |  |
Collaborative Arrangement and Licensing Agreement [Abstract] |  |  |  |  |  |  |
Concentration percentage |  | 66.00% |  | 56.00% | 57.00% | 60.00% |
Biogen [Member] | Minimum [Member] |  |  |  |  |  |  |
Collaborative Arrangement and Licensing Agreement [Abstract] |  |  |  |  |  |  |
Cumulative payments received |  | $ 3,600,000 |  |  | $ 3,600,000 |  |
2013 Strategic Neurology [Member] |  |  |  |  |  |  |
Collaborative Arrangement and Licensing Agreement [Abstract] |  |  |  |  |  |  |
Revenue |  |  | $ 16,000 |  |  |  |
2013 Strategic Neurology [Member] | QALSODY [Member] |  |  |  |  |  |  |
Collaborative Arrangement and Licensing Agreement [Abstract] |  |  |  |  |  |  |
Next payment to be achieved |  | 20,000 |  |  | $ 20,000 |  |
2013 Strategic Neurology [Member] | QALSODY [Member] | Minimum [Member] |  |  |  |  |  |  |
Collaborative Arrangement and Licensing Agreement [Abstract] |  |  |  |  |  |  |
Royalty percentage received on sales of medicine |  |  |  |  | 11.00% |  |
2013 Strategic Neurology [Member] | QALSODY [Member] | Maximum [Member] |  |  |  |  |  |  |
Collaborative Arrangement and Licensing Agreement [Abstract] |  |  |  |  |  |  |
Royalty percentage received on sales of medicine |  |  |  |  | 15.00% |  |
2012 Neurology [Member] | Subsequent Event [Member] |  |  |  |  |  |  |
Collaborative Arrangement and Licensing Agreement [Abstract] |  |  |  |  |  |  |
Next payment to be achieved | $ 70,000 |  |  |  |  |  |
2012 Neurology [Member] | ION582 [Member] |  |  |  |  |  |  |
Collaborative Arrangement and Licensing Agreement [Abstract] |  |  |  |  |  |  |
Milestone payments achieved and included in transaction price for performance obligation |  | $ 21,000 |  |  |  |  |
2012 Neurology [Member] | ION582 [Member] | Subsequent Event [Member] |  |  |  |  |  |  |
Collaborative Arrangement and Licensing Agreement [Abstract] |  |  |  |  |  |  |
Milestone payments achieved and included in transaction price for performance obligation | $ 9,000 |  |  |  |  |  |

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