v3.25.4

Equity (Narrative) (Details) $ / shares in Units, $ / shares in Units, $ in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2025 USD ($) | Dec. 31, 2024 USD ($) | Sep. 30, 2025 USD ($) | Dec. 31, 2025 CAD ($) $ / shares shares | Dec. 31, 2025 USD ($) $ / shares shares | Dec. 31, 2024 CAD ($) $ / shares shares | Dec. 31, 2024 USD ($) $ / shares shares | Mar. 31, 2025 shares | Dec. 31, 2025 $ / shares | Nov. 25, 2025 USD ($) | May 14, 2025 USD ($) | Oct. 03, 2024 USD ($) | Aug. 17, 2023 USD ($)
Share Capital Note Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from common shares issued |  |  |  |  | $ 156,300 |  | $ 121,022 |  |  |  |  |  |
Number of common shares issued for options exercised | shares |  |  |  | 675,100 | 675,100 |  |  |  |  |  |  |  |
Value of common shares issued for options exercised | $ 374 | $ 101 | $ 738 |  | $ 1,112 |  |  |  |  |  |  |  |
Number of warrants issued for consideration | shares |  |  |  | 215,625 | 215,625 | 100,000 | 100,000 |  |  |  |  |  |
Value of broker warrants issued |  |  |  | $ 1,100 |  | $ 145 |  |  |  |  |  |  |
Warrant exercise price | $ / shares |  |  |  | $ 5 |  |  |  |  |  |  |  |  |
October 2024 Equity Distribution Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share Capital Note Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum proceeds under equity distribution agreement |  |  |  |  |  |  |  |  |  |  |  | $ 200,000 |
Proceeds from common shares issued |  |  |  |  | $ 180,800 |  |  |  |  |  |  |  |
Amended October 2024 Equity Distribution Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share Capital Note Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum proceeds under equity distribution agreement |  |  |  |  |  |  |  |  |  |  | $ 119,200 |  |
October 2024 ATM Equity Program [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share Capital Note Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of common shares issued | shares |  |  |  | 15,266,061 | 15,266,061 | 21,367,527 | 21,367,527 |  |  |  |  |  |
Proceeds from common shares issued |  |  |  |  | $ 25,900 | $ 122,600 | $ 87,500 |  |  |  |  |  |
Shares issued during period, price per share | (per share) |  |  |  | $ 2.37 |  | $ 5.74 |  |  | $ 1.7 |  |  |  |
Cash commission paid in equity distribution agreement |  |  |  |  | $ 700 |  | 2,300 |  |  |  |  |  |
Fees incurred related to equity program |  |  |  |  |  |  | $ 400 |  |  |  |  |  |
Amended October 2024 ATM Equity Program [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share Capital Note Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of common shares issued | shares |  |  |  | 53,540,585 | 53,540,585 |  |  |  |  |  |  |  |
Proceeds from common shares issued |  |  |  |  | $ 119,200 |  |  |  |  |  |  |  |
Shares issued during period, price per share | (per share) |  |  |  | $ 3.05 |  |  |  |  | 2.23 |  |  |  |
Cash commission paid in equity distribution agreement |  |  |  |  | 3,100 |  |  |  |  |  |  |  |
Fees incurred related to equity program |  |  |  |  | $ 199 |  |  |  |  |  |  |  |
November 2025 Equity Distribution Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share Capital Note Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum proceeds under equity distribution agreement |  |  |  |  |  |  |  |  |  | $ 300,000 |  |  |
Number of common shares issued | shares |  |  |  | 4,925,948 | 4,925,948 |  |  |  |  |  |  |  |
Proceeds from common shares issued |  |  |  |  | $ 15,800 |  |  |  |  |  |  |  |
Shares issued during period, price per share | (per share) |  |  |  | $ 4.47 |  |  |  |  | $ 3.21 |  |  |  |
Cash commission paid in equity distribution agreement |  |  |  |  | 500 |  |  |  |  |  |  |  |
Fees incurred related to equity program |  |  |  |  | $ 153 |  |  |  |  |  |  |  |
August 2023 Equity Distribution Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share Capital Note Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum proceeds under equity distribution agreement |  |  |  |  |  |  |  |  |  |  |  |  | $ 90,000
Number of common shares issued | shares |  |  |  |  |  | 12,534,457 | 12,534,457 |  |  |  |  |  |
Proceeds from common shares issued |  |  |  |  |  |  | $ 37,400 |  |  |  |  |  |
Shares issued during period, price per share | $ / shares |  |  |  |  |  | $ 4.08 |  |  |  |  |  |  |
Cash commission paid in equity distribution agreement |  |  |  |  |  |  | 1,100 |  |  |  |  |  |
Fees incurred related to equity program |  |  |  |  |  |  | $ 2 |  |  |  |  |  |
Exercise of option one [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share Capital Note Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of common shares issued for options exercised | shares |  |  |  | 500,000 | 500,000 | 100,000 | 100,000 |  |  |  |  |  |
Exercise price of options exercised | $ / shares |  |  |  |  | $ 1.25 |  | $ 1.45 |  |  |  |  |  |
Exercise of option two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share Capital Note Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of common shares issued for options exercised | shares |  |  |  | 100,000 | 100,000 |  |  |  |  |  |  |  |
Exercise price of options exercised | $ / shares |  |  |  |  | $ 1.1 |  |  |  |  |  |  |  |
Exercise of option three [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share Capital Note Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of common shares issued for options exercised | shares |  |  |  | 55,100 | 55,100 |  |  |  |  |  |  |  |
Exercise price of options exercised | $ / shares |  |  |  | $ 5.66 |  |  |  |  |  |  |  |  |
Exercise of option four [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share Capital Note Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of common shares issued for options exercised | shares |  |  |  | 20,000 | 20,000 |  |  |  |  |  |  |  |
Exercise price of options exercised | $ / shares |  |  |  | $ 6.86 |  |  |  |  |  |  |  |  |
Restricted share units [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share Capital Note Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of common shares issued for options exercised | shares |  |  |  | 1,846,882 | 1,846,882 | 118,600 | 118,600 | 326,644 |  |  |  |  |
Megawatt Mining Corp [Member] | Property [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share Capital Note Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued | shares |  |  |  | 1,000,000 | 1,000,000 |  |  |  |  |  |  |  |

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