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Cash and Cash Equivalents and Short-term investments (Narrative) (Details) | 12 Months Ended |  |
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Apr. 30, 2024 CAD ($) | Apr. 30, 2023 CAD ($) | Apr. 30, 2024 MXN ($) | Apr. 30, 2024 USD ($) | Apr. 30, 2023 MXN ($) | Apr. 30, 2023 USD ($)
Disclosure Of Cash And Cash Equivalents And Short Term Investments [Line Items] |  |  |  |  |  |
Operating bank accounts | $ 37,548,304 | $ 12,608,704 |  |  |  |
Current investments | 30,000,000 | $ 6,789,000 |  |  |  | $ 5,000,000
Percentage of interest on GIC investment certificate |  | 5.30% |  |  |  |
Short-term guaranteed investment | $ 0 | $ 40,115,000 |  |  |  |
Other cash and cash equivalents |  |  | $ 441,705 | $ 2,226,985 | $ 6,877,311 | $ 7,797,176
Bottom of range [Member] |  |  |  |  |  |
Disclosure Of Cash And Cash Equivalents And Short Term Investments [Line Items] |  |  |  |  |  |
Percentage of interest on GIC investment certificate | 5.24% |  |  |  |  |
Percentage of interest on GIC investment certificate with maturities of more than 90 days |  | 5.18% |  |  |  |
Top of range [Member] |  |  |  |  |  |
Disclosure Of Cash And Cash Equivalents And Short Term Investments [Line Items] |  |  |  |  |  |
Percentage of interest on GIC investment certificate | 5.33% |  |  |  |  |
Percentage of interest on GIC investment certificate with maturities of more than 90 days |  | 5.24% |  |  |  |

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- Definition The amount of cash and cash equivalents that the entity does not separately disclose in the same statement or note. [Refer: Cash and cash equivalents] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2023-01-01 -Paragraph 45 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2023-en-r&anchor=para_45&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition A classification of cash equivalents representing short-term investments. [Refer: Cash equivalents] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2023-01-01 -Paragraph 45 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2023-en-r&anchor=para_45&doctype=Standard -URIDate 2023-03-23 + Details
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