v3.25.2
Segmented Information - Schedule of plant and equipment by geographical location (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Mar. 31, 2025
Revenues from External Customers and Long-Lived Assets [Line Items]    
Plant and equipment $ 320,400 $ 202,848
Right of use asset 5,340 5,546
Total plant and equipment 325,740 208,394
Canada [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Plant and equipment 204,431 101,311
Right of use asset 3,110 2,918
Total plant and equipment 207,541 104,229
Sweden [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Plant and equipment 22,186 25,953
Right of use asset 2,203 2,588
Total plant and equipment 24,389 28,541
Paraguay [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Plant and equipment 93,783 75,581
Right of use asset 0 0
Total plant and equipment 93,783 75,581
Iceland [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Plant and equipment 0 0
Right of use asset 0 0
Total plant and equipment 0 0
Switzerland [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Plant and equipment 0 0
Right of use asset 0 0
Total plant and equipment 0 0
Bermuda [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Plant and equipment 0 3
Right of use asset 27 40
Total plant and equipment $ 27 $ 43