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Share Capital - Additional Information (Detail) $ / shares in Units, $ / shares in Units, $ in Thousands, $ in Thousands |  |  |  |  |  |  |  |  |  |  |  | 12 Months Ended |
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Dec. 31, 2024 CAD ($) shares | Dec. 31, 2024 $ / shares | Dec. 10, 2024 CAD ($) shares | Jun. 10, 2024 CAD ($) shares | May 28, 2024 CAD ($) shares | May 14, 2024 CAD ($) shares | Dec. 11, 2023 CAD ($) shares | Dec. 09, 2023 CAD ($) $ / shares shares | Sep. 28, 2023 CAD ($) shares | Sep. 22, 2023 CAD ($) shares | Sep. 22, 2023 USD ($) shares | Jun. 09, 2023 shares | Jun. 10, 2022 CAD ($) | Dec. 31, 2024 CAD ($) shares | Dec. 31, 2023 CAD ($) shares | Jan. 06, 2023 CAD ($)
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, Stock Options Exercised | shares |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,757,006 |  |
Proceeds from exercise of stock options |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 20,160 |  |
Proceeds from the issue of ordinary shares |  |  |  |  |  | $ 226,000 |  |  |  |  |  |  |  |  |  |
Options exercised, shares | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,608,816 |
Exercise of options |  |  |  |  |  |  |  |  |  |  |  |  |  | (20,160) | $ (26,349) |
Common shares issued | shares |  |  | 704,584 | 215,219 |  |  | 113,803 |  |  |  |  | 46,038 |  |  |  |
Issue of shares on convertible debenture interest payment |  |  | $ 7,976 | $ 2,088 |  |  | $ 1,064 |  |  |  |  |  | $ 270 | 10,064 | $ 1,498 |
Percentage of issued and outstanding shares acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20.00% |
Options granted, maximum term |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 years |
Share-based payments (Note 12) |  |  |  |  |  |  |  |  |  |  |  |  |  | 29,534 | $ 37,142 |
Payment for share issue costs |  |  |  |  |  | $ 10,336 |  |  |  |  |  |  |  |  |  |
Increase decrease in the shares issued during the period | shares |  |  |  |  |  | 20,161,290 |  |  |  |  |  |  |  |  |  |
Commission Fees [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share issuance costs |  |  |  |  |  | $ 9,084 |  |  |  |  |  |  |  |  |  |
Other Transaction Costs [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share issuance costs |  |  |  |  |  | 1,252 |  |  |  |  |  |  |  |  |  |
Equity Distribution Agreement At The Market Programme December Two Thousand And Twenty Four [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from the issue of ordinary shares | $ 134,948 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share issuance costs | 1,349 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount Of Ordinary Shares Sold Approximately |  |  |  |  |  | 275,900 |  |  |  |  |  |  |  |  |  |
Number Of Ordinary Shares Sold |  |  |  |  |  | $ 500,000 |  |  |  |  |  |  |  |  |  |
Payment for share issue costs | $ 4,993 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Average share price | $ / shares |  | $ 10.38 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase decrease in the shares issued during the period | shares | 13,000,800 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Distribution Agreement At The Market Programme December Two Thousand And Twenty Four [Member] | Other Transaction Costs [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share issuance costs | $ 3,644 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Distribution Agreement At The Market Programme January Two Thousand And Twenty Three [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from the issue of ordinary shares |  |  |  |  |  |  |  | $ 182,066 |  |  |  |  |  |  |  |
Payment for share issue costs |  |  |  |  |  |  |  | $ 6,890 |  |  |  |  |  |  |  |
Average share price | $ / shares |  |  |  |  |  |  |  | $ 7.36 |  |  |  |  |  |  |  |
Increase decrease in the shares issued during the period | shares |  |  |  |  |  |  |  | 24,724,125 |  |  |  |  |  |  |  |
Common Stock Shares Subscribed But Not Issued Value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 250,000
Equity Distribution Agreement At The Market Programme January Two Thousand And Twenty Three [Member] | Commission Fees [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share issuance costs |  |  |  |  |  |  |  | $ 3,704 |  |  |  |  |  |  |  |
Equity Distribution Agreement At The Market Programme January Two Thousand And Twenty Three [Member] | Other Transaction Costs [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share issuance costs |  |  |  |  |  |  |  | $ 3,186 |  |  |  |  |  |  |  |
Equity Distribution Agreement At The Market Programme December Two Thousand And Twenty Three [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock Shares Subscribed But Not Issued Value |  |  |  |  |  |  | $ 500,000 |  |  |  |  |  |  |  |  |
2020 Debentures [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock issue price per share | shares |  |  |  |  |  |  |  |  | 8,663,461 |  |  |  |  |  |  |
Stock issued during the period value conversion of debentures |  |  |  |  |  |  |  |  | $ 72,773 |  |  |  |  |  |  |
Stock issued during period related to accrued and unpaid interest | shares |  |  |  |  |  |  |  |  | 19,522 |  |  |  |  |  |  |
Stock issued during period value related to accrued and unpaid interest |  |  |  |  |  |  |  |  | $ 164 |  |  |  |  |  |  |
2023 Debentures [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Establishment fee (shares) | shares |  |  |  |  | 909,090 |  |  |  |  | 634,615 | 634,615 |  |  |  |  |
Establishment fee |  |  |  |  | $ 10,235 |  |  |  |  | $ 4,443 | $ 3,300 |  |  |  |  |
Included in exploration and evaluation assets [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capitalized to exploration and evaluation assets |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,911 | 6,867 |
Expensed to the statement of loss profit and comprehensive loss profit [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based payments (Note 12) |  |  |  |  |  |  |  |  |  |  |  |  |  | 29,534 | 37,142 |
Reserves [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise of options |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,760 | 16,288 |
Expense from equity settled share based payment transactions |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 36,445 | $ 44,009 |

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