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Share Capital - Additional Information (Detail) $ / shares in Units, $ in Thousands, $ in Thousands |  |  |  | 1 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 01, 2020 shares | Oct. 12, 2018 USD ($) shares | Oct. 12, 2018 CAD ($) $ / shares shares | Jan. 16, 2018 USD ($) shares | Jan. 16, 2018 CAD ($) shares | Jun. 30, 2019 shares | Oct. 30, 2018 USD ($) shares $ / shares | Dec. 31, 2019 USD ($) shares | Dec. 31, 2019 USD ($) $ / shares shares | Dec. 31, 2018 USD ($) shares | Dec. 31, 2018 USD ($) $ / shares shares | Dec. 31, 2019 CAD ($) $ / shares shares | Dec. 31, 2018 $ / shares | Dec. 31, 2017 USD ($) shares | Dec. 31, 2017 $ / shares
Description of share issuances [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share issuance costs | $ |  | $ 2,000 |  |  |  |  |  |  |  | $ 2,467 |  |  |  |  |
Subscription receipts, price | $ / shares |  |  | $ 4.75 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings | $ |  |  |  |  |  |  |  | $ 264,049 | $ 264,049 | $ 214,559 | $ 214,559 |  |  | $ 43,461 |
Proceeds from issuance of private placement |  | $ 75,000 | $ 97,500 |  |  |  |  |  |  |  |  |  |  |  |
Underwriting cash fee |  | 5.00% | 5.00% |  |  |  |  |  |  |  |  |  |  |  |
Number of share options granted |  |  |  |  |  |  |  | 359,210 |  | 543,052 |  |  |  |  |
Share-based compensation expense | $ |  |  |  |  |  |  |  | $ 5,017 |  | $ 5,649 |  |  |  |  |
Number of other equity instruments outstanding |  |  |  |  |  |  |  | 24,051,190 | 24,051,190 |  |  | 24,051,190 |  |  |
Share Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of share issuances [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued |  |  |  |  |  |  |  | 113,500,000 | 113,500,000 |  |  | 113,500,000 |  |  |
Number of shares outstanding |  |  |  |  |  |  |  | 113,452,363 | 113,452,363 | 110,425,401 | 110,425,401 | 113,452,363 |  | 80,949,759 |
Share issuance costs | $ |  |  |  |  |  |  |  |  |  | $ 2,467 |  |  |  |  |
Option Plan [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of share issuances [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of outstanding stock at grant date |  |  |  |  |  |  |  | 10.00% |  |  |  |  |  |  |
Share-based compensation expense | $ |  |  |  |  |  |  |  | $ 900 |  | 1,000 |  |  |  |  |
Weighted average exercise price of options exercisable | $ / shares |  |  |  |  |  |  |  |  |  |  |  | $ 5.32 |  |  |
Equinox Gold Restricted Share Unit Plan [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of share issuances [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation expense | $ |  |  |  |  |  |  |  | $ 3,900 |  | $ 4,600 |  |  |  |  |
Directors Officers And Employees [member] | Option Plan [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of share issuances [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of share options granted |  |  |  |  |  |  |  | 400,000 |  | 500,000 |  |  |  |  |
Share Purchase Warrants [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of share issuances [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of other equity instruments issued |  |  |  |  |  |  |  |  |  | 1,575,000 |  |  |  |  |
Weighted average exercise price of other equity instruments outstanding | $ / shares |  |  |  |  |  |  |  |  |  |  |  | $ 12.00 | $ 11.90 |  | $ 12.45
Number of other equity instruments exercised |  |  |  |  |  |  |  | 363,235 |  | 127,915 |  |  |  |  |
Weighted average exercise price of other equity instruments issued | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 5.35 |  |  |  |
Share Purchase Warrants [member] | Subsequent event [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of share issuances [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of other equity instruments exercised | 932,647 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Performance Based Restricted Share Units [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of share issuances [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of other equity instruments issued |  |  |  |  |  |  |  |  |  | (121,550) |  |  |  |  |
Number of other equity instruments exercised |  |  |  |  |  |  |  | 129,706 |  |  |  |  |  |  |
Number of other equity instruments granted |  |  |  |  |  |  |  | 143,740 |  | 822,100 |  |  |  |  |
Performance Based Restricted Share Units [member] | Equinox Gold Restricted Share Unit Plan [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of share issuances [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of other equity instruments issued |  |  |  |  |  |  |  | 100,000 |  | 100,000 |  |  |  |  |
Award vesting period |  |  |  |  |  |  |  | 3 years |  |  |  |  |  |  |
Performance Based Restricted Share Units [member] | Bottom of range [member] | Equinox Gold Restricted Share Unit Plan [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of share issuances [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Award vesting percentage |  |  |  |  |  |  |  | 50.00% |  |  |  |  |  |  |
Adjustment factor |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |
Performance Based Restricted Share Units [member] | Top of range [member] | Equinox Gold Restricted Share Unit Plan [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of share issuances [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Award vesting percentage |  |  |  |  |  |  |  | 150.00% |  |  |  |  |  |  |
Adjustment factor |  |  |  |  |  |  |  | 3.0 |  |  |  |  |  |  |
Performance Based Restricted Share Units [member] | Directors Officers And Employees [member] | Equinox Gold Restricted Share Unit Plan [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of share issuances [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of other equity instruments granted |  |  |  |  |  |  |  | 100,000 |  | 100,000 |  |  |  |  |
Performance Based Restricted Share Units [member] | Chairman [member] | Equinox Gold Restricted Share Unit Plan [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of share issuances [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of other equity instruments granted |  |  |  |  |  |  |  |  |  | 800,000 |  |  |  |  |
Weighted average grant date fair value of other equity instruments | $ |  |  |  |  |  |  |  |  |  | $ 1,900 | $ 1,900 |  |  |  |
Restricted Share Units [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of share issuances [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of other equity instruments issued |  |  |  |  |  |  |  |  |  | (287,634) |  |  |  |  |
Number of other equity instruments exercised |  |  |  |  |  |  |  | 220,289 |  |  |  |  |  |  |
Number of other equity instruments granted |  |  |  |  |  |  |  | 488,560 |  | 690,998 |  |  |  |  |
Restricted Share Units [member] | Equinox Gold Restricted Share Unit Plan [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of share issuances [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of other equity instruments issued |  |  |  |  |  |  |  | 200,000 |  | 300,000 |  |  |  |  |
Number of other equity instruments granted |  |  |  |  |  |  |  | 500,000 |  | 700,000 |  |  |  |  |
Weighted average share price of other equity instruments granted | $ / shares |  |  |  |  |  |  |  |  | $ 5.65 |  | $ 6.40 |  |  |  |
Cash Settled Restricted Share Units [member] | Equinox Gold Restricted Share Unit Plan [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of share issuances [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of other equity instruments granted |  |  |  |  |  |  |  | 200,000 |  | 0 |  |  |  |  |
Weighted average grant date fair value of other equity instruments | $ |  |  |  |  |  |  |  |  |  |  |  | $ 6,110 |  |  |
Fair value of cash settled share-based payment awards | $ |  |  |  |  |  |  |  | $ 200 | $ 200 |  |  |  |  |  |
Share Purchase Warrants [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of share issuances [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of other equity instruments exercised |  |  |  |  |  |  |  | 155,000 |  |  |  |  |  |  |
Brokered Private Placement [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of share issuances [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued during the period |  | 6,843,000 | 6,843,000 |  |  |  |  |  |  |  |  |  |  |  |
Non Brokered Private Placement [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of share issuances [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued during the period |  | 13,683,320 | 13,683,320 |  |  |  |  |  |  |  |  |  |  |  |
Pacific Road Resources Funds [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of share issuances [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued during the period |  |  |  | 4,200,000 | 4,200,000 |  |  |  |  |  |  |  |  |  |
Proceeds from share issuance |  |  |  | $ 15,200 | $ 19,200 |  |  |  |  |  |  |  |  |  |
Share issuance costs | $ |  |  |  | $ 500 |  |  |  |  |  |  |  |  |  |  |
Sprott [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of share issuances [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings | $ |  |  |  |  |  |  | $ 20,000 |  |  |  |  |  |  |  |
Sprott [member] | Share Purchase Warrants [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of share issuances [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued during the period |  |  |  |  |  |  | 400,000 |  |  |  |  |  |  |  |
Number of other equity instruments issued |  |  |  |  |  |  | 875,000 |  |  |  |  |  |  |  |
Award vesting period |  |  |  |  |  |  | 4 years 3 months |  |  |  |  |  |  |  |
Weighted average exercise price of other equity instruments issued | $ / shares |  |  |  |  |  |  | $ 5.70 |  |  |  |  |  |  |  |
Sandstorm [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of share issuances [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued during the period |  |  |  |  |  | 2,200,000 |  |  |  |  |  |  |  |  |

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