Note 10 - License Agreements	12 Months Ended
Dec. 31, 2023
Notes to Financial Statements
License Agreement Disclosure [Text Block]	NOTE 10 – LICENSE AGREEMENTS *BRIUMVI (Ublituximab)* In January 2012, we entered into an exclusive license agreement with LFB Biotechnologies, GTC Biotherapeutics and LFB/GTC LLC, all wholly-owned subsidiaries of LFB Group, relating to the development of ublituximab (the LFB License Agreement). Under the terms of the LFB License Agreement, we have acquired the exclusive worldwide rights (exclusive of France/Belgium) for the development and commercialization of ublituximab. For the period ended December 31, 2023, we have incurred expenses of approximately $31.0 million related to the achievement of certain milestones of the LFB License Agreement. These expenses are included in other research and development expenses in the accompanying consolidated statements of operations. As of December 31, 2023, we had approximately zero recorded in accounts payable related to the LFB License Agreement. LFB Group is eligible to receive future payments of approximately $6.0 million, upon our successful achievement of certain regulatory milestones, in addition to royalty payments on net sales of ublituximab at a royalty rate in the high-single digits. The license will terminate on a country-by-country basis upon the expiration of the last licensed patent right or 15 years after the first commercial sale of a product in such country, unless the agreement is earlier terminated (i) by LFB if the Company challenges any of the licensed patent rights, (ii) by either party due to a breach of the agreement, or (iii) by either party in the event of the insolvency of the other party. During the year ended December 31, 2023, the Company recorded $8.7 million related to the worldwide royalty due under the LFB License Agreement in cost of revenue based on U.S. sales of BRIUMVI and as of December 31, 2023, approximately $3.9 million in royalties were payable under the LFB License Agreement. In November 2012, we entered into an exclusive (within the territory) sublicense agreement with Ildong Pharmaceutical Co. Ltd. (Ildong) relating to the development and commercialization of ublituximab in South Korea and Southeast Asia. Under the terms of the sublicense agreement, Ildong has been granted a royalty bearing, exclusive right, including the right to grant sublicenses, to develop and commercialize ublituximab in South Korea, Taiwan, Singapore, Indonesia, Malaysia, Thailand, Philippines, Vietnam, and Myanmar. An upfront payment of $2.0 million, which was received in December 2012, net of $0.3 million of income tax withholdings, is being recognized as license revenue on a straight-line basis over the life of the agreement, which is through the expiration of the last licensed patent right or 15 years after the first commercial sale of a product in such country, unless the agreement is earlier terminated, and represents the estimated period over which we will have certain ongoing responsibilities under the sublicense agreement. We recorded license revenue of approximately $0.2 million for each of the years ended December 31, 2023, 2022 and 2021, and at December 31, 2023 and 2022, have deferred revenue of approximately $0.3 million and $0.5 million, respectively, associated with this $2 million payment. We may receive up to an additional $5.0 million in payments upon the achievement of pre-specified milestones. In addition, upon commercialization, Ildong will make royalty payments to us on net sales of ublituximab in the sublicense territory. In July 2023, the Company entered into the Commercialization Agreement with Neuraxpharm. The Company granted Neuraxpharm the exclusive right to commercialize BRIUMVI in certain territories outside the United States, Canada, and Mexico, the commercialization rights for which had been previously retained by the Company, thus, and excluding certain Asian countries subject to previously existing partnerships. Under the terms of the Commercialization Agreement, the Company received a one-time, non-refundable payment of $140.0 million upon contract execution (please refer to Note 2 – Revenue). The Company is eligible to receive an additional $12.5 million upon first key market commercial launch in the EU and up to an additional $492.5 million in milestone-based payments on achievement of certain launch and commercial milestones. In addition, TG will receive tiered double-digit royalties on net product sales up to 30%. In the event of a change of control of the Company (as defined in the Commercialization Agreement), the Company retains an option to buy back all rights under the Commercialization Agreement for a period of two years thereafter. **TG-1701:* BTK*** In January 2018, we entered into a global exclusive license agreement with Jiangsu Hengrui, to acquire worldwide intellectual property rights, excluding Asia but including Japan, and for the research, development, manufacturing, and commercialization of products containing or comprising of any of Hengrui’s Bruton’s Tyrosine Kinase inhibitors containing the compounds of either TG-1701 (SHR1459 or EBI1459) or TG1702 (SHR1266 or EBI1266). Hengrui is eligible to receive milestone payments totaling approximately $350 million upon and subject to the achievement of certain milestones. Various provisions allow for payments in conjunction with the agreement to be made in cash or our common stock, while others limit the form of payment. In July 2020, we paid Hengrui $2.0 million as part of a milestone in accordance with the license agreement. Royalty payments in the low double digits are due on net sales of licensed products and revenue from sublicenses. TG-1801: anti-CD47/anti-CD19 In June 2018, we entered into a Joint Venture and License Option Agreement with Novimmune to collaborate on the development and commercialization of Novimmune’s novel first-in-class anti-CD47/anti-CD19 bispecific antibody known as TG-1801 (previously NI-1701). The companies will jointly develop the product on a worldwide basis, focusing on indications in the area of hematologic B-cell malignancies. We serve as the primary responsible party for the development, manufacturing and commercialization of the product. Milestone payments will be paid based on early clinical development, and the Company will be responsible for the costs of clinical development of the product through the end of the Phase 2 clinical trials, after which the Company and Novimmune will be jointly responsible for all development and commercialization costs. The Company and Novimmune will each maintain an exclusive option, exercisable at specific times during development, for the Company to license the rights to TG-1801, in which case Novimmune is eligible to receive additional milestone payments totaling approximately $185 million as well as tiered royalties on net sales in the high single to low double digits upon and subject to the achievement of certain milestones. *UKONIQ (umbralisib)* On September 22, 2014, we exercised our option to license the global rights to umbralisib, thereby entering into an exclusive licensing agreement (the TGR-1202 License) with Rhizen Pharmaceuticals, SA (Rhizen) for the development and commercialization of umbralisib. As of December 31, 2023, we have incurred approximately $24.0 million related to the achievement of certain milestones of the Umbralisib License. Under the terms of the TGR 1202 License, Rhizen is eligible to receive approval and sales-based milestone payments in the aggregate of approximately $175 million payable. For the year ended December 31, 2021, we paid Rhizen $12.0 million as part of a primary indication approval milestone for launch of product in the US in accordance with the terms of the Umbralisib License. Additionally, Rhizen receives tiered royalties that escalate from high single digits to low double digits on any net sales of umbralisib. UKONIQ was officialy withdrawn from the market in May 2022 and all commercialization activities were discontinued. As a result of the withdrawal, during the year ended December 31, 2023, the Company recorded zero related to the worldwide royalty due under the Umbralisib License in cost of revenue based on U.S. sales of UKONIQ, and as of December 31, 2023, no royalties were payable under the Umbralisib License. Due to the withdrawal of UKONIQ from the U.S. market and discontinuation of all commercialization activities, we do not expect to incur any additional costs related to this license agreement. **TG-1501:* Cosibelimab*** In March 2015, we entered into a Global Collaboration Agreement (Collaboration Agreement) with Checkpoint for the development and commercialization of anti-PD-L1 and anti-GITR antibody research programs in the field of hematological malignancies. The Collaboration Agreement was amended in June 2019 and in March of 2020. We incurred expenses of approximately $0.1 million for each of the years ended December 31, 2023, 2022 and 2021, the majority of which relates to manufacturing expenses, clinical study expenses and milestone payments of PD-L1. The relevant expenses are recorded in other research and development in the accompanying consolidated statements of operations.

Note 10 - License Agreements

12 Months Ended

Dec. 31, 2023

License Agreement Disclosure [Text Block]

NOTE 10 – LICENSE AGREEMENTS

BRIUMVI (Ublituximab)

In January 2012, we entered into an exclusive license agreement with LFB Biotechnologies, GTC Biotherapeutics and LFB/GTC LLC, all wholly-owned subsidiaries of LFB Group, relating to the development of ublituximab (the LFB License Agreement). Under the terms of the LFB License Agreement, we have acquired the exclusive worldwide rights (exclusive of France/Belgium) for the development and commercialization of ublituximab. For the period ended December 31, 2023, we have incurred expenses of approximately $31.0 million related to the achievement of certain milestones of the LFB License Agreement. These expenses are included in other research and development expenses in the accompanying consolidated statements of operations. As of December 31, 2023, we had approximately zero recorded in accounts payable related to the LFB License Agreement.

LFB Group is eligible to receive future payments of approximately $6.0 million, upon our successful achievement of certain regulatory milestones, in addition to royalty payments on net sales of ublituximab at a royalty rate in the high-single digits. The license will terminate on a country-by-country basis upon the expiration of the last licensed patent right or 15 years after the first commercial sale of a product in such country, unless the agreement is earlier terminated (i) by LFB if the Company challenges any of the licensed patent rights, (ii) by either party due to a breach of the agreement, or (iii) by either party in the event of the insolvency of the other party. During the year ended December 31, 2023, the Company recorded $8.7 million related to the worldwide royalty due under the LFB License Agreement in cost of revenue based on U.S. sales of BRIUMVI and as of December 31, 2023, approximately $3.9 million in royalties were payable under the LFB License Agreement.

In November 2012, we entered into an exclusive (within the territory) sublicense agreement with Ildong Pharmaceutical Co. Ltd. (Ildong) relating to the development and commercialization of ublituximab in South Korea and Southeast Asia. Under the terms of the sublicense agreement, Ildong has been granted a royalty bearing, exclusive right, including the right to grant sublicenses, to develop and commercialize ublituximab in South Korea, Taiwan, Singapore, Indonesia, Malaysia, Thailand, Philippines, Vietnam, and Myanmar.

An upfront payment of $2.0 million, which was received in December 2012, net of $0.3 million of income tax withholdings, is being recognized as license revenue on a straight-line basis over the life of the agreement, which is through the expiration of the last licensed patent right or 15 years after the first commercial sale of a product in such country, unless the agreement is earlier terminated, and represents the estimated period over which we will have certain ongoing responsibilities under the sublicense agreement. We recorded license revenue of approximately $0.2 million for each of the years ended December 31, 2023, 2022 and 2021, and at December 31, 2023 and 2022, have deferred revenue of approximately $0.3 million and $0.5 million, respectively, associated with this $2 million payment.

We may receive up to an additional $5.0 million in payments upon the achievement of pre-specified milestones. In addition, upon commercialization, Ildong will make royalty payments to us on net sales of ublituximab in the sublicense territory.

In July 2023, the Company entered into the Commercialization Agreement with Neuraxpharm. The Company granted Neuraxpharm the exclusive right to commercialize BRIUMVI in certain territories outside the United States, Canada, and Mexico, the commercialization rights for which had been previously retained by the Company, thus, and excluding certain Asian countries subject to previously existing partnerships. Under the terms of the Commercialization Agreement, the Company received a one-time, non-refundable payment of $140.0 million upon contract execution (please refer to Note 2 – Revenue). The Company is eligible to receive an additional $12.5 million upon first key market commercial launch in the EU and up to an additional $492.5 million in milestone-based payments on achievement of certain launch and commercial milestones. In addition, TG will receive tiered double-digit royalties on net product sales up to 30%. In the event of a change of control of the Company (as defined in the Commercialization Agreement), the Company retains an option to buy back all rights under the Commercialization Agreement for a period of two years thereafter.

TG-1701: BTK

In January 2018, we entered into a global exclusive license agreement with Jiangsu Hengrui, to acquire worldwide intellectual property rights, excluding Asia but including Japan, and for the research, development, manufacturing, and commercialization of products containing or comprising of any of Hengrui’s Bruton’s Tyrosine Kinase inhibitors containing the compounds of either TG-1701 (SHR1459 or EBI1459) or TG1702 (SHR1266 or EBI1266). Hengrui is eligible to receive milestone payments totaling approximately $350 million upon and subject to the achievement of certain milestones. Various provisions allow for payments in conjunction with the agreement to be made in cash or our common stock, while others limit the form of payment. In July 2020, we paid Hengrui $2.0 million as part of a milestone in accordance with the license agreement. Royalty payments in the low double digits are due on net sales of licensed products and revenue from sublicenses.

TG-1801: anti-CD47/anti-CD19

In June 2018, we entered into a Joint Venture and License Option Agreement with Novimmune to collaborate on the development and commercialization of Novimmune’s novel first-in-class anti-CD47/anti-CD19 bispecific antibody known as TG-1801 (previously NI-1701). The companies will jointly develop the product on a worldwide basis, focusing on indications in the area of hematologic B-cell malignancies. We serve as the primary responsible party for the development, manufacturing and commercialization of the product. Milestone payments will be paid based on early clinical development, and the Company will be responsible for the costs of clinical development of the product through the end of the Phase 2 clinical trials, after which the Company and Novimmune will be jointly responsible for all development and commercialization costs. The Company and Novimmune will each maintain an exclusive option, exercisable at specific times during development, for the Company to license the rights to TG-1801, in which case Novimmune is eligible to receive additional milestone payments totaling approximately $185 million as well as tiered royalties on net sales in the high single to low double digits upon and subject to the achievement of certain milestones.

UKONIQ (umbralisib)

On September 22, 2014, we exercised our option to license the global rights to umbralisib, thereby entering into an exclusive licensing agreement (the TGR-1202 License) with Rhizen Pharmaceuticals, SA (Rhizen) for the development and commercialization of umbralisib. As of December 31, 2023, we have incurred approximately $24.0 million related to the achievement of certain milestones of the Umbralisib License.

Under the terms of the TGR 1202 License, Rhizen is eligible to receive approval and sales-based milestone payments in the aggregate of approximately $175 million payable. For the year ended December 31, 2021, we paid Rhizen $12.0 million as part of a primary indication approval milestone for launch of product in the US in accordance with the terms of the Umbralisib License. Additionally, Rhizen receives tiered royalties that escalate from high single digits to low double digits on any net sales of umbralisib. UKONIQ was officialy withdrawn from the market in May 2022 and all commercialization activities were discontinued. As a result of the withdrawal, during the year ended December 31, 2023, the Company recorded zero related to the worldwide royalty due under the Umbralisib License in cost of revenue based on U.S. sales of UKONIQ, and as of December 31, 2023, no royalties were payable under the Umbralisib License. Due to the withdrawal of UKONIQ from the U.S. market and discontinuation of all commercialization activities, we do not expect to incur any additional costs related to this license agreement.

TG-1501: Cosibelimab

In March 2015, we entered into a Global Collaboration Agreement (Collaboration Agreement) with Checkpoint for the development and commercialization of anti-PD-L1 and anti-GITR antibody research programs in the field of hematological malignancies. The Collaboration Agreement was amended in June 2019 and in March of 2020. We incurred expenses of approximately $0.1 million for each of the years ended December 31, 2023, 2022 and 2021, the majority of which relates to manufacturing expenses, clinical study expenses and milestone payments of PD-L1. The relevant expenses are recorded in other research and development in the accompanying consolidated statements of operations.