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BASIC AND DILUTED LOSS PER COMMON SHARE
 9 Months Ended
Sep. 30, 2018
Earnings Per Share [Abstract]  
Basic and Diluted Loss Per Common Share
BASIC AND DILUTED LOSS PER COMMON SHARE
Basic and diluted loss per share
The calculation of basic and diluted earnings per share after adjustment for the effects of all potential dilutive common shares, calculated as follows:
 
Three months ended
September 30,
 
Nine months ended
September 30,
 
2018
 
2017
 
2018
 
2017
Income (loss) attributable to shareholders
$
(13,812
)
 
$
(4,766
)
 
$
(17,485
)
 
$
(19,744
)
Basic and diluted weighted average number of common shares outstanding
87,197,294

 
71,436,413

 
80,843,493

 
70,216,934

Income (loss) per common share
$
(0.16
)
 
$
(0.07
)
 
$
(0.20
)
 
$
(0.28
)

For the nine months ended September 30, 2018, 8.44 million (September 30, 2017 - 8.71 million) options and warrants and the potential conversion of the Debentures have been excluded from the calculation as their effect would have been anti-dilutive.