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Material Agreements (Details) - USD ($) $ in Thousands |  |  |  |  |  |  | 1 Months Ended | 2 Months Ended | 3 Months Ended | 9 Months Ended | 17 Months Ended | 29 Months Ended | 47 Months Ended |  |
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Mar. 27, 2023 | Mar. 02, 2023 | Oct. 26, 2022 | Sep. 26, 2022 | Nov. 03, 2020 | Apr. 01, 2016 | Jun. 30, 2024 | Dec. 31, 2020 | Sep. 30, 2024 | Sep. 30, 2023 | Mar. 31, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Feb. 20, 2019 | Mar. 31, 2023 | Sep. 30, 2024 | May 17, 2022 | Mar. 03, 2022
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest income and other income, net |  |  |  |  |  |  |  |  | $ 979 | $ 1,514 |  | $ 2,703 | $ 16,156 |  |  |  |  |
Manufacture and supply |  |  |  |  |  |  |  |  | 4,437 | 4,798 |  | 13,352 | 16,152 |  |  |  |  |
Royalties related to the sale of future revenue |  |  |  |  |  |  |  |  | 13,542 | 13,002 |  | 45,694 | 37,377 |  |  |  |  |
Chief Executive Officer |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Severance costs monthly payment, duration |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 18 months |
Severance costs |  |  |  |  |  |  |  |  |  |  | $ 274 |  |  |  |  |  |  |
Assertio Holdings, Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalties related to the sale of future revenue |  |  | $ 6,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from collaborators |  |  | $ 9,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Manufacture and supply revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalties related to the sale of future revenue |  |  |  |  |  |  |  |  | 10,671 | 11,409 |  | 29,312 | 32,807 |  |  |  |  |
License and royalty revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalties related to the sale of future revenue |  |  |  |  |  |  |  |  | 2,162 | 1,103 |  | $ 14,514 | 3,503 |  |  |  |  |
Commercial exploitation agreement with Indivior |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
License agreement term |  |  |  |  |  |  |  |  |  |  |  | 7 years |  |  |  |  |  |
Automatic renewal period of agreement |  | 1 year |  |  |  |  |  |  |  |  |  | 1 year |  |  |  |  |  |
Collaborative Arrangement, Transaction with Party to Collaborative Arrangement | Indivior |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred income |  |  |  |  |  |  |  |  |  | $ 5,482 |  |  | 5,482 |  |  |  |  |
Revenue from collaborative arrangement, excluding revenue from contract with customer |  |  |  |  |  |  |  |  |  |  |  |  | 11,482 |  |  |  |  |
Interest income and other income, net |  |  |  |  |  |  |  |  |  |  |  |  | 6,000 |  |  |  |  |
Manufacture and supply |  |  |  |  |  |  |  |  |  |  |  |  | 5,482 |  |  |  |  |
Collaborative Arrangement, Transaction with Party to Collaborative Arrangement | Manufacture and supply revenue | Indivior |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from collaborative arrangement, excluding revenue from contract with customer |  |  |  |  |  |  |  |  |  |  |  |  | 4,396 |  |  |  |  |
Deferred income, revenue recognized |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,682 |  |  |  |  |
Supplemental agreement with Indivior |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate payment |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 40,750 |  |  |  |
License agreement with Sunovion Pharmaceuticals, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate payment |  |  |  |  |  | $ 22,000 |  |  |  |  |  |  |  |  |  |  |  |
License agreement with Sunovion Pharmaceuticals, Inc. upfront |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate payment |  |  |  |  |  | 5,000 |  |  |  |  |  |  |  |  |  |  |  |
License agreement with Sunovion Pharmaceuticals, Inc milestones |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate payment |  |  |  |  |  | 17,000 |  |  |  |  |  |  |  |  |  |  |  |
License agreement with Sunovion Pharmaceuticals, Inc milestones | License and royalty revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalties related to the sale of future revenue |  |  |  |  |  | $ 4,000 |  |  |  |  |  |  |  |  |  |  |  |
MAM Pangolin Royalty , LLC | Monetization Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of future revenue |  |  |  |  | $ 40,000 |  |  | $ 10,000 |  |  |  |  |  |  | $ 50,000 | $ 50,000 |  |
Proceeds from debt, contingent on additional milestones |  |  |  |  | 75,000 |  |  |  |  |  |  |  |  |  |  |  |  |
MAM Pangolin Royalty , LLC | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of future revenue |  |  |  |  | $ 125,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Haisco Pharmaceutical Group Co., Ltd, upfront payment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Receivable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 7,000
Sales commissions and fees |  |  |  |  |  |  |  |  | 134 |  |  | $ 134 |  |  |  |  |  |
Revenue recognized |  |  |  |  |  |  |  |  | $ 7,000 |  |  | 7,000 |  |  |  |  |  |
License & Supply Agreement | Atnahs Pharma UK Limited |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of future revenue |  |  |  | $ 3,500 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Atnahs Pharma UK Limited, Amended Agreement | License & Supply Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of future revenue | $ 2,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mitsubishi Tanabe Pharma America, Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales commissions and fees |  |  |  |  |  |  |  |  |  |  |  | $ 57 |  |  |  |  |  |
Revenue recognized |  |  |  |  |  |  | $ 3,317 |  |  |  |  |  |  |  |  |  |  |

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