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Share capital (Tables)
 12 Months Ended
Dec. 31, 2018
Disclosure of share capital, reserves and other equity interest [Abstract]  
Disclosure of number and weighted average exercise prices of share options
A summary of changes to stock options outstanding is as follows:
 
 
Number of
outstanding
options

 
Weighted-
average
exercise price

 
 
(‘000’s)

 
(in Cdn.$)

 
 
 
 
 
Outstanding at December 31, 2016
 
50,410

 
2.24

Granted
 
22,968

 
3.65

Exercised
 
(13,708
)
 
2.54

Forfeited or expired
 
(2,068
)
 
3.27

Outstanding at December 31, 2017
 
57,602

 
2.70

Granted
 
25,380

 
3.35

Exercised
 
(12,347
)
 
2.40

Forfeited or expired
 
(3,003
)
 
3.50

Outstanding at December 31, 2018
 
67,632

 
2.96
Disclosure of range of exercise prices of outstanding share options
Stock options outstanding and exercisable as at December 31, 2018 are as follows:
Range of exercise prices
(in Cdn.$)
Number of outstanding options
(‘000’s)

Weighted- average years to expiry

Weighted-average exercise price
(in Cdn.$)

Number of exercisable options
(‘000’s)

Weighted-average exercise price
(in Cdn.$)

 
 
 
 
 
 
1.12 – 1.99
8,513

2.09

1.12

7,558

1.12

2.00 – 2.99
10,610

1.35

2.08

10,174

2.05

3.00 – 3.99
48,434

3.91

3.47

19,590

3.50

4.00 – 4.99
75

3.10

4.05

50

4.05

 
67,632

3.28

2.96

37,372

2.63
Disclosure of number and weighted average remaining contractual life of outstanding share options
Stock options outstanding and exercisable as at December 31, 2018 are as follows:
Range of exercise prices
(in Cdn.$)
Number of outstanding options
(‘000’s)

Weighted- average years to expiry

Weighted-average exercise price
(in Cdn.$)

Number of exercisable options
(‘000’s)

Weighted-average exercise price
(in Cdn.$)

 
 
 
 
 
 
1.12 – 1.99
8,513

2.09

1.12

7,558

1.12

2.00 – 2.99
10,610

1.35

2.08

10,174

2.05

3.00 – 3.99
48,434

3.91

3.47

19,590

3.50

4.00 – 4.99
75

3.10

4.05

50

4.05

 
67,632

3.28

2.96

37,372

2.63
Disclosure of number and weighted average exercise prices of other equity instruments
Summary of changes to RSUs outstanding:
 
Number of
outstanding
RSUs

 
(‘000’s)

 
 
Outstanding at December 31, 2016
1,237

Granted
1,793

Vested and converted to common shares
(1,760
)
Outstanding at December 31, 2017
1,270

Granted
1,455

Vested and converted to common shares
(671
)
Outstanding at December 31, 2018
2,054
Earnings per share
The following is the calculation of diluted net income attributable to shareholders of the Company for the year:
 
 
2018

 
2017

 
 
$

 
$

 
 
 
 
 
Net income for the year (attributable to shareholders of the Company)
 
$
28,938

 
$
56,852

Dilutive impact of gain on fair value of convertible notes
 
(10,651
)
 
—

Diluted net income for the year (attributable to shareholders of the Company)
 
$
18,287

 
$
56,852


The following is the calculation of diluted weighted average number of common shares outstanding for the year:
 
 
2018

 
2017

 
 
$

 
$

 
 
 
 
 
Basic weighted average number of common shares outstanding (in thousands)
 
986,755

 
976,366

 
 
 
 
 
Effect of dilutive securities:
 
 
 
 
Convertible notes
 
49,393

 
—

Stock options
 
10,762

 
14,627

Restricted share units
 
458

 
420

Diluted weighted average number of common shares outstanding (in thousands)
 
1,047,368

 
991,413


The following is the basic and diluted earnings per share:
 
 
2018

 
2017

 
 
$

 
$

 
 
 
 
 
Earnings per share (attributable to shareholders of the Company)
 
 
 
 
Basic
 
$
0.03

 
$
0.06

Diluted
 
$
0.02

 
$
0.06