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Royalty and Commercial Payment Purchase Agreements - Viracta (Details) $ in Thousands |  | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 22, 2021 USD ($) item | Jun. 30, 2022 USD ($) | Jun. 30, 2021 USD ($) | Dec. 31, 2021 USD ($)
Agreements |  |  |  |
Payments related to purchase of royalty rights and other commercial payment rights |  |  | $ 13,500 |
Long-term royalty and commercial payment receivables |  | $ 66,575 |  | $ 69,075
Impairment of long-term royalty receivable |  | 0 |  | 0
Viracta | Royalty Purchase Agreement |  |  |  |
Agreements |  |  |  |
Number of drug candidates | item | 2 |  |  |
Payments related to purchase of royalty rights and other commercial payment rights | $ 13,500 |  |  |
Maximum amount of potential milestones and other payments receivable | 54,000 |  |  |
Amount of maximum consideration retained | 20,000 |  |  |
Maximum amount of potential regulatory and commercial milestones receivable | 57,000 |  |  |
Long-term royalty and commercial payment receivables | $ 13,500 |  |  |
Impairment of long-term royalty receivable |  | $ 0 |  | $ 0

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