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Stock-based compensation - Reconciliation of Stock Options Outstanding (Details) | 12 Months Ended
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Mar. 31, 2022 shares $ / shares | Mar. 31, 2021 shares $ / shares
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |
Outstanding - Beginning of year (in shares) | shares | 6,796,039 | 7,557,574
Granted (in shares) | shares | 7,920,684 | 2,183,108
Assumed through business combination (in shares) | shares | 0 | 1,226,214
Exercised (in shares) | shares | (1,061,359) | (2,951,034)
Forfeited (in shares) | shares | (1,832,054) | (1,219,823)
Outstanding - End of fiscal year (in shares) | shares | 11,823,310 | 6,796,039
Exercisable - End of fiscal year (in shares) | shares | 2,600,818 | 1,523,685
Weighted average exercise price, options outstanding, beginning of year, after foreign exchange adjustment (in USD per share) | $ / shares |  | $ 24.56
Weighted average exercise price, options outstanding, beginning of year (in USD per share) | $ / shares | $ 24.48 | 15.38
Weighted average exercise price, options granted (in USD per share) | $ / shares | 49.47 | 41.55
Weighted average exercise price, options assumed in business combination (in USD per share) | $ / shares | 0 | 6.40
Weighted average exercise price, options exercised (in USD per share) | $ / shares | 16.48 | 7.12
Weighted average exercise price, options forfeited (in USD per share) | $ / shares | 47.84 | 22.48
Weighted average exercise price, options outstanding, end of year (in USD per share) | $ / shares | 38.37 | 24.48
Weighted average exercisable price, options expired (in USD per share) | $ / shares | $ 23.05 | $ 17.40
Share options conditional to share price |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |
Granted (in shares) | shares | 2,500,000 |

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- Definition The number of share options outstanding in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2021-01-01 -Paragraph 45 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_45_d&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2021-01-01 -Paragraph 45 -Subparagraph b -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_45_b_i&doctype=Standard -URIDate 2021-03-24 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2021-01-01 -Paragraph 45 -Subparagraph b -Clause vi -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_45_b_vi&doctype=Standard -URIDate 2021-03-24 + Details
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