| Royalty and Commercial Payment Purchase Agreements - Kuros (Details) - USD ($) $ in Thousands | 12 Months Ended | |||
|---|---|---|---|---|
| Jul. 14, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | |
| Agreements | ||||
| Long-term royalty and commercial payment receivables | $ 69,075 | $ 34,575 | $ 34,375 | |
| Impairment of long-term royalty receivable | 0 | $ 0 | ||
| Kuros | Royalty Purchase Agreement | ||||
| Agreements | ||||
| Royalties entity has right to receive (as a percent) | 100.00% | |||
| Pre-commercial milestone payments | $ 25,500 | |||
| Upfront payment | 7,000 | |||
| Potential future sales milestone payments | 142,500 | |||
| Long-term royalty and commercial payment receivables | $ 7,000 | |||
| 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. No definition available. 
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- Definition Maximum eligible milestone payments receivable upon achievement of development, pre-commercial milestones. No definition available. 
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- Definition Maximum eligible milestone payments receivable upon achievement of sales milestones. No definition available. 
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- Definition The aggregate amount of write-downs for impairments recognized during the period for long term royalty receivable assets. No definition available. 
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- Definition Long-term royalty and commercial rights receivables, non current. No definition available. 
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- Definition Royalties entity has the right to receive as a percentage. No definition available. 
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- Definition The cash outflow for initial payment under agreement. No definition available. 
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