Subsequent Event	12 Months Ended
Dec. 31, 2023
Subsequent Events [Abstract]
Subsequent Event	Note 18. Subsequent Event On February 5, 2024, we entered into a purchase agreement with MorphoSys that became effective as of that date, as a result of which we now hold exclusive global rights for tafasitamab, a humanized Fc-modified CD19-targeting immunotherapy marketed in the United States as MONJUVI (tafasitamab-cxix) and outside of the United States as MINJUVI (tafasitamab). Under the terms of the new agreement, we made a payment of $25.0 million to MorphoSys and gained global development and commercialization rights for tafasitamab along with MONJUVI inventory. We will recognize revenue and costs for all U.S. commercialization and clinical development and MorphoSys will no longer be eligible to receive future milestone, profit split and royalty payments under our prior agreement with MorphoSys, which agreement has now been terminated. Under the purchase agreement, we have become the successor to MorphoSys under its collaboration and license agreement with Xencor, Inc. (“Xencor”), pursuant to which Xencor granted MorphoSys an exclusive, worldwide license, including the right to sublicense under certain conditions, for tafasitamab. Xencor is entitled to receive up to $186.5 million in future contingent development and regulatory milestones, and up to $50.0 million in sales milestones. Furthermore, Xencor is eligible to receive tiered royalties on global net sales of tafasitamab in the single-digit to sub-teen double-digit percentage range. Our royalty obligations continue on a country-by-country basis until the later to occur of the expiration of the last valid claim in the licensed patent covering tafasitamab in such country, or 11 years after the first sale thereof following marketing authorization in such country. The term of the Xencor collaboration agreement will continue until all of our royalty payment obligations have expired, unless terminated earlier. The Xencor collaboration agreement may be terminated by either party upon written notice to the other party immediately in the event of the other party’s insolvency or upon 120 days’ written notice for the other party’s uncured material breach (or upon 30 days’ written notice in the case of a breach of a payment obligation). Moreover, we may terminate the Xencor collaboration agreement without cause upon 90 days’ advance written notice to Xencor. In the event that (i) we terminate this agreement for convenience or (ii) Xencor terminates due to our material breach, our challenge of Xencor’s licensed patents or our insolvency, worldwide rights to develop, manufacture and commercialize licensed products, including tafasitamab, revert back to Xencor.

Subsequent Event

12 Months Ended

Dec. 31, 2023

Note 18. Subsequent Event

On February 5, 2024, we entered into a purchase agreement with MorphoSys that became effective as of that date, as a result of which we now hold exclusive global rights for tafasitamab, a humanized Fc-modified CD19-targeting immunotherapy marketed in the United States as MONJUVI (tafasitamab-cxix) and outside of the United States as MINJUVI (tafasitamab). Under the terms of the new agreement, we made a payment of $25.0 million to MorphoSys and gained global development and commercialization rights for tafasitamab along with MONJUVI inventory. We will recognize revenue and costs for all U.S. commercialization and clinical development and MorphoSys will no longer be eligible to receive future milestone, profit split and royalty payments under our prior agreement with MorphoSys, which agreement has now been terminated. Under the purchase agreement, we have become the successor to MorphoSys under its collaboration and license agreement with Xencor, Inc. (“Xencor”), pursuant to which Xencor granted MorphoSys an exclusive, worldwide license, including the right to sublicense under certain conditions, for tafasitamab. Xencor is entitled to receive up to $186.5 million in future contingent development and regulatory milestones, and up to $50.0 million in sales milestones. Furthermore, Xencor is eligible to receive tiered royalties on global net sales of tafasitamab in the single-digit to sub-teen double-digit percentage range. Our royalty obligations continue on a country-by-country basis until the later to occur of the expiration of the last valid claim in the licensed patent covering tafasitamab in such country, or 11 years after the first sale thereof following marketing authorization in such country. The term of the Xencor collaboration agreement will continue until all of our royalty payment obligations have expired, unless terminated earlier. The Xencor collaboration agreement may be terminated by either party upon written notice to the other party immediately in the event of the other party’s insolvency or upon 120 days’ written notice for the other party’s uncured material breach (or upon 30 days’ written notice in the case of a breach of a payment obligation). Moreover, we may terminate the Xencor collaboration agreement without cause upon 90 days’ advance written notice to Xencor. In the event that (i) we terminate this agreement for convenience or (ii) Xencor terminates due to our material breach, our challenge of Xencor’s licensed patents or our insolvency, worldwide rights to develop, manufacture and commercialize licensed products, including tafasitamab, revert back to Xencor.