v3.8.0.1
Shareholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2017
Equity [Abstract]  
Summary of the Stock Option and RSU Award Activities
The following table summarizes the stock option and RSU award activities under the Company's share-based compensation plans for the years ended December 31, 2017 and 2016:

 
Shares Subject to Options Outstanding
 
Outstanding RSUs
 
Number of Options (1)
 
Weighted Average Exercise Price
$
 
Remaining Contractual Term (in years)
 
Aggregate Intrinsic Value (2)
$
 
Weighted Average Grant Date Fair Value
$
 
Outstanding RSUs
 
Weighted Average Grant Date Fair Value
$
December 31, 2015
11,204,026

 
3.65

 
6.99

 
248,119

 
—

 
428,566

 
32.19

Stock options granted
2,021,723

 
31.73
 
—

 
—

 
16.13

 
—

 
—

Stock options exercised
(3,037,644
)
 
1.37
 
—

 
—

 
—

 
—

 
—

Stock options forfeited
(288,712
)
 
15.62
 
—

 
—

 
—

 
—

 
—

RSUs granted
—

 
—

 
—

 
—

 
—

 
2,116,701

 
29.60

RSUs settled
—

 
—

 
—

 
—

 
—

 
(104,740
)
 
32.46

RSUs forfeited
—

 
—

 
—

 
—

 
—

 
(79,710
)
 
28.90

December 31, 2016
9,899,393

 
9.74

 
6.78

 
328,003

 
—

 
2,360,817

 
29.97

Stock options granted
1,061,478

 
74.80
 
—

 
—

 
37.51

 
—

 
—

Stock options exercised
(3,322,993
)
 
4.45
 
—

 
—

 
—

 
—

 
—

Stock options forfeited
(284,332
)
 
31.65
 
—

 
—

 
—

 
—

 
—

RSUs granted
—

 
—

 
—

 
—

 
—

 
1,172,707

 
81.89

RSUs settled
—

 
—

 
—

 
—

 
—

 
(824,215
)
 
28.85

RSUs forfeited
—

 
—

 
—

 
—

 
—

 
(210,631
)
 
40.21

December 31, 2017
7,353,546

 
20.67
 
6.81

 
590,700

 
—

 
2,498,678

 
53.84

 
 
 
 
 
 
 
 
 
 
 
 
 
 
Stock options exercisable as of December 31, 2017
4,331,284

 
6.18
 
5.69

 
410,710

 
 
 
 
 
 
(1) As at December 31, 2017, 4,359,989 of the outstanding stock options were granted under the Company's Legacy Option Plan and are exercisable for Class B multiple voting shares, and 2,993,557 of the outstanding stock options were granted under the Company's Stock Option Plan and are exercisable for Class A subordinate voting shares.
(2) The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying stock option awards and the closing market price of the Company's common stock as of December 31, 2017 and December 31, 2016.
Schedule of Assumptions Used to Estimate the Fair Value of Stock Options
The assumptions used to estimate the fair value of stock options granted to employees are as follows:
    
 
2017

2016
Expected volatility
56.0
%

59.1
%
Risk free interest rate
1.85
%

1.32
%
Dividend yield
Nil


Nil

Average expected life
5.15


5.07
Schedule of Classification of Stock-based Compensation
The following table illustrates the classification of stock-based compensation in the Consolidated Statements of Operations and Comprehensive Loss, which includes both stock-based compensation and restricted share-based compensation expense.  
    
 
Years ended
 
December 31, 2017
 
December 31, 2016
 
$
 
$
Cost of revenues
1,102

 
629

Sales and marketing
8,986

 
3,951

Research and development
31,338

 
14,318

General and administrative
7,737

 
4,200

 
49,163

 
23,098