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Royalty and Commercial Payment Purchase Agreements - Palo (Details) |  | 12 Months Ended |
--- | --- | --- | ---
Sep. 26, 2019 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Agreements |  |  |  |
Long-term royalty and commercial payment receivables |  | $ 63,683,000 | $ 69,075,000 | $ 34,575,000
Impairment of long-term royalty receivable |  | 0 | $ 0 |
Palo | Royalty Purchase Agreement |  |  |  |
Agreements |  |  |  |
Number of drug candidates | 6 |  |  |
Payments related to purchase of royalty rights and other commercial payment rights | $ 10,000,000.0 |  |  |
Long-term royalty and commercial payment receivables | $ 10,000,000.0 |  |  |
Impairment of long-term royalty receivable |  | $ 0 |  |

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- 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. + References No definition available. + Details
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