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Research and Development Agreement | 12 Months Ended
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Dec. 31, 2025
Research and Development [Abstract] |
Research and Development Agreement | (9) Research and Development Agreement In December 2018, the Company entered into an agreement with the Belgium Walloon Region Government ("Walloon Region") in which the Walloon Region agreed to provide a grant of €1.3 million and a repayable advance of €8.3 million for the development of one of the Company’s research programs. During 2020, the Company discontinued research efforts related to this program. Other current liabilities of $2.5 million and $2.3 million, as of December 31, 2025 and 2024, respectively, represent the remaining amount of the advance received. In 2022, the Company received notice that the Walloon Region had obtained a default judgment seeking repayment of approximately $2.5 million of the advance based upon the Company allegedly not providing required notification that research and operations in the region were discontinued.

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