v3.26.1
New Accounting Policies - Additional Information (Details) - CAD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Dec. 31, 2023
Sep. 30, 2023
Summary Of Significant Accounting Policies [Line Items]                      
Long-term debt $ 233,360       $ 304,069            
Accumulated deficit $ (11,138,227) $ (10,983,503) $ (10,925,158) $ (10,920,180) $ (10,875,319) $ (10,679,363) $ (10,581,280) $ (10,472,317) $ (10,366,441) $ (10,217,946) $ (10,012,282)