Note 4 - Notes Receivable (Details Textual) - USD ($) $ in Millions |
Jul. 27, 2023 |
Jul. 27, 2021 |
Jul. 27, 2018 |
May 31, 2025 |
---|---|---|---|---|
Note Receivable Upon Completion of Galore Creek Project Pre-feasibility [Member] | ||||
Financing Receivable, after Allowance for Credit Loss | $ 75 | $ 75 | ||
Proceeds from Collection of Notes Receivable | $ 25 | $ 75 | ||
Note Receivable Upon Completion of Galore Creek Project Feasibility [Member] | ||||
Financing Receivable, after Allowance for Credit Loss | 25 | |||
Note Receivable Upon Approval of Galore Creek Project Construction Plan [Member] | ||||
Financing Receivable, after Allowance for Credit Loss | 75 | |||
Galore Creek [Member] | ||||
Proceeds from Divestiture of Interest in Subsidiaries and Affiliates | $ 100 |