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Income taxes - Income Tax Expense (Recovery) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
Current |  |
Related to current year | $ 2,880 | $ 1,214
Related to prior years | (411) | (111)
Current tax expense (income) and adjustments for current tax of prior periods | 2,469 | 1,103
Deferred |  |
Related to current year | (6,338) | (27,831)
Related to prior years | (350) | (193)
Deferred tax expense (income) | (6,688) | (28,024)
Total income tax recovery | $ (4,219) | $ (26,921)

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