Income Taxes - Summary of Reconciliation of Amount of Income Taxes Compared to Expected Income Taxes Calculated at Federal Statutory Income Tax Rate (Details) - CAD ($) $ in Thousands |
12 Months Ended | ||||
|---|---|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
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| Amount | |||||
| Canadian federal statutory rate | $ 39,433 | $ 76,164 | $ 76,165 | ||
| State and local income taxes, net of federal income tax effect | [1] | (65) | (2,966) | (5,286) | |
| Acquisition costs | (1,178) | (949) | (3,749) | ||
| Deconsolidation of subsidiaries | 0 | 0 | (51,787) | ||
| Settlement of debt | 0 | (4,715) | 1,174 | ||
| Fair value of warrant derivative liability | 1,305 | 13,386 | (5,462) | ||
| Other | (1,123) | 133 | (330) | ||
| Non-deductible and (non taxable) items | (996) | 7,855 | (60,154) | ||
| Other | (1,544) | (90) | (1,209) | ||
| Foreign Tax Effects | (9,340) | 56,973 | (27,853) | ||
| Change in valuation allowance | (22,485) | (90,220) | 55,468 | ||
| Reversal of tax recorded in OCI | 0 | (3,203) | (5,830) | ||
| Non-taxable portion of capital gains and losses | (5,026) | (51,654) | (43,628) | ||
| Other adjustments | (6,570) | (54,947) | (50,667) | ||
| Income tax expense (recovery) | $ (23) | $ (7,141) | $ (12,327) | ||
| Percent | |||||
| Canadian federal statutory rate | 15.00% | 15.00% | 15.00% | ||
| State and local income taxes, net of federal income tax effect | [1] | (0.20%) | (3.90%) | (6.90%) | |
| Acquisition costs | (3.00%) | (1.20%) | (4.90%) | ||
| Deconsolidation of subsidiaries | 0.00% | 0.00% | (68.00%) | ||
| Settlement of debt | 0.00% | (6.20%) | 1.50% | ||
| Fair value of warrant derivative liability | 3.30% | 17.60% | (7.20%) | ||
| Other | (2.80%) | 0.20% | (0.40%) | ||
| Non-deductible and (non taxable) items | (2.50%) | 10.30% | (79.00%) | ||
| Other | (3.90%) | (0.10%) | (1.60%) | ||
| Foreign Tax Effects | (23.70%) | 74.70% | (36.60%) | ||
| Change in valuation allowances | (57.00%) | (118.50%) | 72.80% | ||
| Reversal of tax recorded in OCI | 0.00% | (4.20%) | (7.70%) | ||
| Non-taxable portion of capital gains and losses | (12.70%) | (67.80%) | (57.30%) | ||
| Other adjustments | (16.70%) | (72.10%) | (66.50%) | ||
| Income tax (expense) recovery | (0.10%) | (9.40%) | (16.20%) | ||
| Netherlands | |||||
| Amount | |||||
| Federal statutory tax rate differential | $ (155) | $ 1,135 | $ 6,697 | ||
| Divestiture of subsidiaries | 0 | 0 | (16,069) | ||
| Other | 366 | (2,866) | 266 | ||
| Rate differential | $ 211 | $ (1,731) | $ (9,106) | ||
| Percent | |||||
| Federal statutory tax rate differential | (0.40%) | 1.50% | 8.80% | ||
| Divestiture of subsidiaries | 0.00% | 0.00% | (21.10%) | ||
| Other | 0.90% | (3.80%) | 0.30% | ||
| Rate differential | 0.50% | (2.30%) | (12.00%) | ||
| Germany | |||||
| Amount | |||||
| Federal statutory tax rate differential | $ 10,725 | $ 1,538 | $ 6,982 | ||
| Valuation Allowance | (21,076) | (2,892) | (15,772) | ||
| Other | 325 | (143) | (1,127) | ||
| Rate differential | $ (10,026) | $ (1,497) | $ (9,917) | ||
| Percent | |||||
| Federal statutory tax rate differential | 27.20% | 2.00% | 9.20% | ||
| Valuation Allowance | (53.40%) | (3.80%) | (20.70%) | ||
| Other | 0.80% | (0.20%) | (1.50%) | ||
| Rate differential | (25.40%) | (2.00%) | (13.00%) | ||
| United Kingdom | |||||
| Amount | |||||
| Federal statutory tax rate differential | $ 0 | $ (11,570) | $ (3,865) | ||
| Divestiture of subsidiaries | 0 | 28,905 | 9,663 | ||
| Rate differential | $ 0 | $ 17,335 | $ 5,798 | ||
| Percent | |||||
| Federal statutory tax rate differential | 0.00% | (15.20%) | (5.10%) | ||
| Divestiture of subsidiaries | 0.00% | 38.00% | 12.70% | ||
| Rate differential | 0.00% | 22.80% | 7.60% | ||
| United States of America | |||||
| Amount | |||||
| Deconsolidation of subsidiaries | $ 0 | $ 43,365 | $ (7,348) | ||
| Federal statutory tax rate differential | 252 | 869 | 15,783 | ||
| Valuation Allowance | (259) | (3,091) | (27,995) | ||
| Rate differential | $ (7) | $ 41,143 | $ (19,560) | ||
| Percent | |||||
| Deconsolidation of subsidiaries | 0.00% | 56.90% | (9.60%) | ||
| Federal statutory tax rate differential | 0.60% | 1.10% | 20.70% | ||
| Valuation Allowance | (0.70%) | (4.10%) | (36.80%) | ||
| Rate differential | 0.00% | 53.90% | (25.70%) | ||
| Other Foreign Jurisdictions | |||||
| Amount | |||||
| Rate differential | $ 482 | $ 1,723 | $ 4,932 | ||
| Percent | |||||
| Rate differential | 1.20% | 2.30% | 6.50% | ||
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| X | ||||||||||
- Definition Effective income tax rate reconciliation acquisition costs. No definition available.
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- Definition Effective income tax rate reconciliation divestiture of subsidiaries. No definition available.
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- Definition Effective income tax rate reconciliation, fair value of warrant derivative liability, percent. No definition available.
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- Definition Effective income tax rate reconciliation federal statutory tax rate differential. No definition available.
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- Definition Effective income tax rate reconciliation foreign tax effects. No definition available.
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- Definition Effective income tax rate reconciliation nondeductible and nontaxable items. No definition available.
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- Definition Effective income tax rate reconciliation nondeductible expense acquisition costs amount. No definition available.
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- Definition Effective income tax rate reconciliation, reversal of tax recorded in OCI, amount. No definition available.
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- Definition Effective income tax rate reconciliation, reversal of tax recorded in OCI, percentage. No definition available.
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- Definition Effective income tax rate reconciliation settlement of debt. No definition available.
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- Definition Effective income tax rate reconciliation, valuation allowance, amount. No definition available.
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- Definition Effective income tax rate reconciliation, valuation allowance, percent. No definition available.
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- Definition Income tax reconciliation divestiture of subsidiaries amount. No definition available.
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- Definition Income tax reconciliation, fair value of warrant derivative liability. No definition available.
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- Definition Income tax reconciliation federal statutory tax rate differential amount. No definition available.
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- Definition Income tax reconciliation foreign tax effects amount. No definition available.
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- Definition Income tax reconciliation non-deductible and non-taxable items. No definition available.
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- Definition Income tax reconciliation nondeductible settlement of debt amount. No definition available.
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| X | ||||||||||
- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other nondeductible expenses. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to restructuring charges. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Percentage of reported income tax benefit (expense) from difference to income tax expense (benefit) computed by applying statutory federal (national) income tax rate to pretax income (loss) from continuing operation, attributable to other reconciling items. Excludes state and local income tax expense (benefit), federal tax expense (benefit), statutory income tax expense (benefit) outside of country of domicile, tax credit, nondeductible expense, deduction, income tax settlement, income tax contingency, and cross-border tax law. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income (loss) exempt from income taxes. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- References No definition available.
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign income tax expense (benefit). Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other nondeductible expenses. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible restructuring charges. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying statutory federal (national) tax rate to pretax income (loss) from continuing operation attributable to other reconciling item. Excludes state and local income tax expense (benefit), federal tax expense (benefit), statutory income tax expense (benefit) outside of country of domicile, tax credit, nondeductible expense, deduction, income tax settlement, income tax contingency, and cross-border tax law. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to state and local income tax expense (benefit). Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income (loss) exempt from income taxes. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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