License Agreements - Merus (Details) $ in Thousands |
1 Months Ended | 3 Months Ended | 9 Months Ended | 94 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2016
item
|
Sep. 30, 2024
USD ($)
shares
|
Jun. 30, 2024
USD ($)
shares
|
Sep. 30, 2023
USD ($)
|
Sep. 30, 2024
USD ($)
shares
|
Sep. 30, 2023
USD ($)
|
Sep. 30, 2024
USD ($)
shares
|
Dec. 31, 2023
USD ($)
|
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| License Agreements | |||||||||||
| Long term equity investments | $ 27,566 | $ 27,566 | $ 27,566 | $ 187,716 | [1] | ||||||
| Realized and unrealized (loss) gain on equity investments | $ (12,982) | $ (26,654) | $ 126,206 | $ 9,839 | |||||||
| Merus | |||||||||||
| License Agreements | |||||||||||
| Shares divested (in shares) | shares | 1,000,000.0 | 3,000,000.0 | |||||||||
| Proceeds from sale of equity securities, FV-NI | $ 55,500 | $ 160,600 | |||||||||
| Common stock held from investment (in shares) | shares | 0 | 0 | 0 | ||||||||
| Long term equity investments | $ 110,100 | ||||||||||
| Realized and unrealized (loss) gain on equity investments | $ (4,100) | $ 106,100 | |||||||||
| Unrealized gain (loss) on long term investments | $ (9,100) | $ 29,500 | |||||||||
| Merus | |||||||||||
| License Agreements | |||||||||||
| Number of independent programs | item | 10 | ||||||||||
| Milestone payment made under license agreement | $ 10,000 | ||||||||||
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