v3.26.1
Segmented Information - Schedule of plant and equipment by geographical location (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Mar. 31, 2026
Revenues from External Customers and Long-Lived Assets [Line Items]    
Plant and equipment $ 453,154 $ 480,476
ROU asset 106,411 43,096
Total plant and equipment 559,565 523,572
Canada [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Plant and equipment 116,947 113,646
ROU asset 105,689 41,954
Total plant and equipment 222,636 155,600
Sweden [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Plant and equipment 11,661 14,076
ROU asset 604 1,012
Total plant and equipment 12,265 15,088
Paraguay [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Plant and equipment 324,546 352,754
ROU asset 0 0
Total plant and equipment 324,546 352,754
Iceland [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Plant and equipment 0 0
ROU 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
ROU 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 0
ROU asset 118 130
Total plant and equipment $ 118 $ 130