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SHARE CAPITAL - Additional information (Details) $ / shares in Units, $ in Millions, $ in Millions |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Aug. 30, 2019 CAD ($) $ / shares shares | Aug. 30, 2019 USD ($) shares | Mar. 31, 2017 USD ($) | Dec. 31, 2019 USD ($) shares | Dec. 31, 2018 USD ($)
SHARE CAPITAL |  |  |  |  |
Deferred tax expense (income) |  |  | $ 1.9 | $ (3.0) | $ (14.5)
Issuance of common shares | shares | 93,750,000 | 93,750,000 |  | 93,750,000 |
Shares issued in equity offering, price per share | $ / shares | $ 1.60 |  |  |  |
Net proceeds on equity offering |  | $ 106.7 |  | $ 106.7 | 0.0
Gross proceeds on equity offering | $ 150.0 |  |  |  |
Share-based payment expenses recognized in operating expenses |  |  |  | $ 1.0 | $ 0.0

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- Definition Number of new stock issued during the period. + References No definition available. + Details
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