Note 3. Prepaid Project Costs and Other Long-term Assets

In 2022, the Company entered into two agreements with Idaho National Laboratory (INL), in collaboration with the United States Department of Energy (DOE), to support the development of Lightbridge Fuel™. At the time of signing, the Company made advanced payments for future project work totaling $0.4 million to Battelle Energy Alliance, LLC (BEA), DOE’s operating contractor for INL. In May 2023, the Company and INL modified the agreements to extend the contract term to May 2029, aligning it with the duration of the irradiation testing and increasing the advanced payments by $0.1 million to $0.5 million. The prepaid project costs were $0.5 million as of March 31, 2024 and December 31, 2023, recorded under Other Assets - Prepaid project costs and other long-term assets.