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PER SHARE AMOUNTS (Tables)
 12 Months Ended
Dec. 31, 2018
Earnings per share [abstract]  
Earnings per share
The calculation of basic earnings per share for the year ended December 31, 2018 was based on a net loss of $146.3 million (2017: net loss of $91.4 million). 
 
2018

2017

Basic common shares outstanding
80,909,225

49,378,026

Fully dilutive effect of:
 

 

Share options outstanding
952,532

1,622,132

Shares issuable on conversion of Convertible Debentures
6,172,840

6,172,840

Warrants outstanding
3,088,205

—

Fully diluted common shares outstanding
91,122,802

57,172,998

Weighted average shares outstanding
59,734,872

49,351,848

Dilutive effect of share options, Convertible Debentures and Warrants (1)
—

—

Diluted weighted average shares outstanding
59,734,872

49,351,848

Net (loss) profit per share - basic
$
(2.45
)
$
(1.85
)
Net (loss) profit per share - diluted
$
(2.45
)
$
(1.85
)
(1)
For the year ended December 31, 2018, a total of 952,532 (2017: 1,622,132) share options, 6,172,840 (2017: 6,172,840) shares issuable on conversion of Convertible Debentures and 3,088,205 Warrants (2017: nil) were excluded from the calculation as they were anti-dilutive.