v3.26.1
Strategic Alliance with Allseas Group S. A. and Affiliates - Development of Project Zero Offshore Nodule Collection System (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Strategic Alliance with Allseas and Affiliates    
Exploration and evaluation expenses $ 40,282 $ 50,643
Project Management Technology Services    
Strategic Alliance with Allseas and Affiliates    
Exploration and evaluation expenses $ 5,000 $ 11,900