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Royalty and Commercial Payment Purchase Agreements - Palo (Details) $ in Thousands |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 26, 2019 USD ($) item | Mar. 31, 2022 USD ($) | Mar. 31, 2021 USD ($) | Dec. 31, 2021 USD ($)
Agreements |  |  |  |
Payments related to purchase of royalty rights and other commercial payment rights |  | $ 5,000 | $ 13,500 |
Long-term royalty and commercial payment receivables |  | 69,075 |  | $ 69,075
Impairment of long-term royalty receivable |  | 0 |  | $ 0
Palo | Royalty Purchase Agreement |  |  |  |
Agreements |  |  |  |
Number of drug candidates | item | 6 |  |  |
Payments related to purchase of royalty rights and other commercial payment rights | $ 10,000 |  |  |
Long-term royalty and commercial payment receivables | $ 10,000 |  |  |
Impairment of long-term royalty receivable |  | $ 0 |  |

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- Definition The aggregate amount of write-downs for impairments recognized during the period for long term royalty receivable assets. + References No definition available. + Details
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