| Royalty and Commercial Payment Purchase Agreements - Summary (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022 | 
|---|---|---|
| Agreements | ||
| Short-term royalty and commercial payment receivables | $ 0 | $ 2,366 | 
| Long-term royalty and commercial payment receivables | $ 74,696 | $ 63,683 | 
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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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Long-term royalty and commercial rights receivables, non current. No definition available. 
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- Definition Royalty, interest and commercial payment rights receivable, due within one year or the normal operating cycle, if longer. No definition available. 
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