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ASSETS AND LIABILITIES HELD FOR SALE AND DISCONTINUED OPERATIONS - Narrative (Details) $ in Thousands |  |  | 12 Months Ended
--- | --- | --- | ---
Jan. 04, 2021 USD ($) | Dec. 30, 2020 USD ($) oz | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Disclosure of non-current assets held for sale and discontinued operations [Line Items] |  |  |  |
Gain on sale of Sadiola |  |  | $ 0 | $ 4,100
Sadiola |  |  |  |
Disclosure of non-current assets held for sale and discontinued operations [Line Items] |  |  |  |
Total assets, consideration received |  |  |  | 42,300
Deferred consideration - milestone payments |  |  |  | 14,300
Gain on sale of Sadiola |  | $ 4,100 |  | $ 4,100
Allied Gold Corp | Disposal groups classified as held for sale | Sadiola |  |  |  |
Disclosure of non-current assets held for sale and discontinued operations [Line Items] |  |  |  |
Total assets, consideration received |  | 50,000 |  |
Allied Gold Corp | Disposal groups classified as held for sale | Sadiola | Trigger One |  |  |  |
Disclosure of non-current assets held for sale and discontinued operations [Line Items] |  |  |  |
Deferred consideration - milestone payments |  | $ 25,000 |  |
Contingent consideration receivable, production milestone | oz |  | 250,000 |  |
Allied Gold Corp | Disposal groups classified as held for sale | Sadiola | Trigger Two |  |  |  |
Disclosure of non-current assets held for sale and discontinued operations [Line Items] |  |  |  |
Deferred consideration - milestone payments |  | $ 25,000 |  |
Contingent consideration receivable, production milestone | oz |  | 250,000 |  |
Allied Gold Corp | Disposal groups classified as held for sale | Sadiola | Trigger Three |  |  |  |
Disclosure of non-current assets held for sale and discontinued operations [Line Items] |  |  |  |
Deferred consideration - milestone payments |  | $ 2,500 |  |
Allied Gold Corp | Disposal groups classified as held for sale | Sadiola | Disposals of assets |  |  |  |
Disclosure of non-current assets held for sale and discontinued operations [Line Items] |  |  |  |
Total assets, consideration received | $ 3,600 |  |  |
Allied Gold Corp | Disposal groups classified as held for sale | Sadiola | AGA |  |  |  |
Disclosure of non-current assets held for sale and discontinued operations [Line Items] |  |  |  |
Total assets, consideration received |  | 25,000 |  |
Allied Gold Corp | Disposal groups classified as held for sale | Sadiola | AGA | Trigger One |  |  |  |
Disclosure of non-current assets held for sale and discontinued operations [Line Items] |  |  |  |
Deferred consideration - milestone payments |  | 12,500 |  |
Allied Gold Corp | Disposal groups classified as held for sale | Sadiola | AGA | Trigger Two |  |  |  |
Disclosure of non-current assets held for sale and discontinued operations [Line Items] |  |  |  |
Deferred consideration - milestone payments |  | 12,500 |  |
Allied Gold Corp | Disposal groups classified as held for sale | Sadiola | AGA | Trigger Three |  |  |  |
Disclosure of non-current assets held for sale and discontinued operations [Line Items] |  |  |  |
Deferred consideration - milestone payments |  | 1,250 |  |
Allied Gold Corp | Disposal groups classified as held for sale | Sadiola | AGA | Disposals of assets |  |  |  |
Disclosure of non-current assets held for sale and discontinued operations [Line Items] |  |  |  |
Total assets, consideration received | 1,800 |  |  |
Allied Gold Corp | Disposal groups classified as held for sale | Sadiola | IAMGOLD CORP |  |  |  |
Disclosure of non-current assets held for sale and discontinued operations [Line Items] |  |  |  |
Total assets, consideration received |  | 25,000 |  |
Allied Gold Corp | Disposal groups classified as held for sale | Sadiola | IAMGOLD CORP | Trigger One |  |  |  |
Disclosure of non-current assets held for sale and discontinued operations [Line Items] |  |  |  |
Deferred consideration - milestone payments |  | 12,500 |  |
Allied Gold Corp | Disposal groups classified as held for sale | Sadiola | IAMGOLD CORP | Trigger Two |  |  |  |
Disclosure of non-current assets held for sale and discontinued operations [Line Items] |  |  |  |
Deferred consideration - milestone payments |  | 12,500 |  |
Allied Gold Corp | Disposal groups classified as held for sale | Sadiola | IAMGOLD CORP | Trigger Three |  |  |  |
Disclosure of non-current assets held for sale and discontinued operations [Line Items] |  |  |  |
Deferred consideration - milestone payments |  | $ 1,250 |  |
Allied Gold Corp | Disposal groups classified as held for sale | Sadiola | IAMGOLD CORP | Disposals of assets |  |  |  |
Disclosure of non-current assets held for sale and discontinued operations [Line Items] |  |  |  |
Total assets, consideration received | $ 1,800 |  |  |

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