v3.26.1
Financial Instruments and risks - Disclosure of fair value measurement of financial assets and liabilities (Details) - USD ($)
$ in Thousands
Apr. 30, 2026
Apr. 30, 2025
Apr. 30, 2024
Disclosure of fair value measurement of liabilities [Line items]      
Cash and cash equivalents $ 427,310 $ 96,016 $ 27,316
Other receivables 1,514 634 464
Short-term investments 0 8,620 0
Investments in equity instruments 3,668 240 440
Warrants investments 1,138 0 0
Capped call derivative options 27,016 0 0
Assets 731,499 300,423 198,559
Accounts payable and accrued liabilities 6,154 3,179 1,840
Due to related parties 482 285 836
Derivative liabilities 49,482 0 0
Convertible notes 237,355 0 0
Liabilities 300,138 4,628 $ 2,676
Recurring fair value measurement [Member]      
Disclosure of fair value measurement of liabilities [Line items]      
Cash and cash equivalents 427,310 96,016  
Other receivables 1,514 634  
Assets 460,646 105,510  
Accounts payable and accrued liabilities 6,154 3,179  
Due to related parties 482 285  
Convertible notes 237,355 0  
Liabilities 293,473 3,464  
Recurring fair value measurement [Member] | Level 1 of fair value hierarchy [Member]      
Disclosure of fair value measurement of liabilities [Line items]      
Short-term investments 0 8,620  
Investments in equity instruments 3,668 240  
Recurring fair value measurement [Member] | Level 2 of fair value hierarchy [Member]      
Disclosure of fair value measurement of liabilities [Line items]      
Warrants investments 1,138 0  
Recurring fair value measurement [Member] | Level 3 of fair value hierarchy [Member]      
Disclosure of fair value measurement of liabilities [Line items]      
Capped call derivative options 27,016 0  
Derivative liabilities $ 49,482 $ 0