Commitments and Contingencies	3 Months Ended
Mar. 31, 2026
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	4. Commitments and Contingencies License Agreements License Agreement and Research and Development Agreement —The University of Texas MD Anderson Cancer Center In 2015, the Company, together with Precigen, entered into a license agreement, or the MD Anderson License with MD Anderson (which Precigen subsequently assigned to PGEN). Pursuant to the MD Anderson License, the Company, together with Precigen, holds an exclusive, worldwide license to certain technologies owned and licensed by MD Anderson including technologies relating to novel CAR T-cell therapies, non-viral gene transfer systems, genetic modification and/or propagation of immune cells and other cellular therapy approaches, Natural Killer, or NK Cells, and TCRs. In 2015, the Company, Precigen and MD Anderson entered into the 2015 R&D Agreement to formalize the scope and process for the transfer by MD Anderson, pursuant to the terms of the MD Anderson License, of certain existing research programs and related technology rights, as well as the terms and conditions for future collaborative research and development of new and ongoing research programs. As provided under the MD Anderson License, the Company provided funding for research and development activities in support of the research programs under the 2015 R&D Agreement. At various times, the Company amended the 2015 R&D Agreement to extend the term until December 31, 2026 and in 2019 entered into the 2019 R&D Agreement, pursuant to which the Company agreed to collaborate with respect to the TCR program. The 2019 R&D Agreement will terminate on December 31, 2026 and either party may terminate the 2019 R&D Agreement following written notice of a material breach. The 2019 R&D Agreement also contains customary provisions related to indemnification obligations, confidentiality and other matters. During the reporting period, the Company continued to engage with The University of Texas M.D. Anderson Cancer Center (“MD Anderson”) to wind down the TCR trials. The parties completed the final reconciliation of amounts due under the related R&D agreements, and the Company received the final invoice during the second quarter of 2025. Amounts due to MD Anderson and recorded in accounts payable were $57 and $143 as of March 31, 2026 and December 31, 2025, respectively. On November 4, 2025, the Office of the Attorney General of Texas, on behalf of MD Anderson, issued a demand for payment. On December 17, 2025, the Company entered into a Settlement and Release Agreement with MD Anderson to resolve the matter. Pursuant to the agreement, the Company agreed to pay $285 in six installments through May 30, 2026, in full satisfaction of the outstanding invoices. The agreement also provides for mutual general releases, subject to customary exceptions, including for breach of the settlement agreement and certain ongoing matters such as Protocol 2006-0676. Patent and Technology License Agreement—The University of Texas MD Anderson Cancer Center and the Texas A&M University System In August 2004, the Company entered into a patent and technology license agreement with MD Anderson and the Texas A&M University System, which the Company refers to, collectively, as the Licensors. Under this agreement, the Company was granted an exclusive, worldwide license to rights (including rights to U.S. and foreign patent and patent applications and related improvements and know-how) for the manufacture and commercialization of two classes of organic arsenicals (water- and lipid-based) for human and animal use. The class of water-based organic arsenicals includes darinaparsin. Under the terms of the agreement, the Company may be required to make payments to the Licensors upon achievement of certain milestones in varying amounts which, on a cumulative basis could total up to an additional $4.5 million. In addition, the Licensors are entitled to receive low single digit royalties on net sales from a licensed product and will also be entitled to receive a portion of any fees that the Company may receive from a possible sublicense under certain circumstances. During the three months ended March 31, 2026 and 2025, the Company did not incur any milestone expenses or royalty expenses under this agreement. Collaboration Agreement with Solasia Pharma K.K. In 2011, the Company entered into a License and Collaboration Agreement with Solasia Pharma K. K., or Solasia, which was amended in 2014 to include an exclusive worldwide license and further amended in 2021 to revise certain payment schedule details, or, as so amended, the Solasia License and Collaboration Agreement. Pursuant to the Solasia License and Collaboration Agreement, the Company granted Solasia an exclusive license to develop and commercialize darinaparsin in both intravenous and oral forms and related organic arsenic molecules, in all indications for human use. As consideration for the license, the Company is eligible to receive from Solasia development- and sales-based milestones, a royalty on net sales of darinaparsin, once commercialized, and a percentage of any sublicense revenue generated by Solasia. During the three months ended March 31, 2026 and 2025, the Company earned collaboration revenue of $0 and $2 thousand, respectively under this agreement. Insurance Contract During three months ended March 31, 2026, the Company entered into an insurance arrangement covering certain risks, for which the premium had been fully prepaid, with coverage effective over a six-year period. Accordingly, the Company began amortizing the prepaid expense related to the contract. The Company has classified the prepaid contract between its current portion and long term-portion. As of March 31, 2026, $388 is included in prepaid expenses and other current assets and $831 is included in prepaid expense and other non-current assets in the accompanying condensed consolidated balance sheet.

Commitments and Contingencies

3 Months Ended

Mar. 31, 2026

Commitments and Contingencies Disclosure [Abstract]

License Agreements

License Agreement and Research and Development Agreement —The University of Texas MD Anderson Cancer Center

In 2015, the Company, together with Precigen, entered into a license agreement, or the MD Anderson License with MD Anderson (which Precigen subsequently assigned to PGEN). Pursuant to the MD Anderson License, the Company, together with Precigen, holds an exclusive, worldwide license to certain technologies owned and licensed by MD Anderson including technologies relating to novel CAR T-cell therapies, non-viral gene transfer systems, genetic modification and/or propagation of immune cells and other cellular therapy approaches, Natural Killer, or NK Cells, and TCRs.

In 2015, the Company, Precigen and MD Anderson entered into the 2015 R&D Agreement to formalize the scope and process for the transfer by MD Anderson, pursuant to the terms of the MD Anderson License, of certain existing research programs and related technology rights, as well as the terms and conditions for future collaborative research and development of new and ongoing research programs.

As provided under the MD Anderson License, the Company provided funding for research and development activities in support of the research programs under the 2015 R&D Agreement. At various times, the Company amended the 2015 R&D Agreement to extend the term until December 31, 2026 and in 2019 entered into the 2019 R&D Agreement, pursuant to which the Company agreed to collaborate with respect to the TCR program.

The 2019 R&D Agreement will terminate on December 31, 2026 and either party may terminate the 2019 R&D Agreement following written notice of a material breach. The 2019 R&D Agreement also contains customary provisions related to indemnification obligations, confidentiality and other matters.

During the reporting period, the Company continued to engage with The University of Texas M.D. Anderson Cancer Center (“MD Anderson”) to wind down the TCR trials. The parties completed the final reconciliation of amounts due under the related R&D agreements, and the Company received the final invoice during the second quarter of 2025. Amounts due to MD Anderson and recorded in accounts payable were $57 and $143 as of March 31, 2026 and December 31, 2025, respectively.

On November 4, 2025, the Office of the Attorney General of Texas, on behalf of MD Anderson, issued a demand for payment. On December 17, 2025, the Company entered into a Settlement and Release Agreement with MD Anderson to resolve the matter. Pursuant to the agreement, the Company agreed to pay $285 in six installments through May 30, 2026, in full satisfaction of the outstanding invoices. The agreement also provides for mutual general releases, subject to customary exceptions, including for breach of the settlement agreement and certain ongoing matters such as Protocol 2006-0676.

Patent and Technology License Agreement—The University of Texas MD Anderson Cancer Center and the Texas A&M University System

In August 2004, the Company entered into a patent and technology license agreement with MD Anderson and the Texas A&M University System, which the Company refers to, collectively, as the Licensors. Under this agreement, the Company was granted an exclusive, worldwide license to rights (including rights to U.S. and foreign patent and patent applications and related improvements and know-how) for the manufacture and commercialization of two classes of organic arsenicals (water- and lipid-based) for human and animal use. The class of water-based organic arsenicals includes darinaparsin.

Under the terms of the agreement, the Company may be required to make payments to the Licensors upon achievement of certain milestones in varying amounts which, on a cumulative basis could total up to an additional $4.5 million. In addition, the Licensors are entitled to receive low single digit royalties on net sales from a licensed product and will also be entitled to receive a portion of any fees that the Company may receive from a possible sublicense under certain circumstances. During the three months ended March 31, 2026 and 2025, the Company did not incur any milestone expenses or royalty expenses under this agreement.

Collaboration Agreement with Solasia Pharma K.K.

In 2011, the Company entered into a License and Collaboration Agreement with Solasia Pharma K. K., or Solasia, which was amended in 2014 to include an exclusive worldwide license and further amended in 2021 to revise certain payment schedule details, or, as so amended, the Solasia License and Collaboration Agreement. Pursuant to the Solasia License and Collaboration Agreement, the

Company granted Solasia an exclusive license to develop and commercialize darinaparsin in both intravenous and oral forms and related organic arsenic molecules, in all indications for human use.

As consideration for the license, the Company is eligible to receive from Solasia development- and sales-based milestones, a royalty on net sales of darinaparsin, once commercialized, and a percentage of any sublicense revenue generated by Solasia.

During the three months ended March 31, 2026 and 2025, the Company earned collaboration revenue of $0 and $2 thousand, respectively under this agreement.

Insurance Contract

During three months ended March 31, 2026, the Company entered into an insurance arrangement covering certain risks, for which the premium had been fully prepaid, with coverage effective over a six-year period. Accordingly, the Company began amortizing the prepaid expense related to the contract. The Company has classified the prepaid contract between its current portion and long term-portion. As of March 31, 2026, $388 is included in prepaid expenses and other current assets and $831 is included in prepaid expense and other non-current assets in the accompanying condensed consolidated balance sheet.