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Share-Based Compensation (Tables)
 12 Months Ended
Jun. 30, 2020
Share-based payment arrangements [Abstract]  
Number and Weighted Average Exercise Prices of Share Options
A summary of stock-options outstanding is as follows:
 
Stock
Options

Weighted Average
Exercise Price

 
#

$

Balance, June 30, 2018
2,346,343

64.32

Granted
4,897,993

97.44

Exercised (1)
(1,202,242
)
38.64

Forfeited
(348,697
)
100.92

Balance, June 30, 2019
5,693,397

95.88

Granted
1,232,796

54.27

Exercised (1)
(103,828
)
26.91

Expired
(135,926
)
51.72

Forfeited
(937,936
)
98.94

Balance, June 30, 2020
5,748,503

88.60


(1) 
The weighted average share price on the option exercise dates for the year ended June 30, 2020 was $78.08 (year ended June 30, 2019 – $120.60).
Range of Exercise Prices of Outstanding Share Options
The following table summarizes the stock options that remain outstanding as at June 30, 2020:
Exercise Price ($)
Expiry Date
Weighted Average Remaining Life
Options Outstanding (#)

Options Exercisable (#)

3.54 - 19.80
August 10, 2020 - June 24, 2025
2.61
96,383

72,949

21.72 - 83.88
August 9, 2020 - May 25, 2025
3.13
1,848,143

1,001,407

84.00 - 119.88
December 21, 2022 - September 19, 2024
3.35
1,441,674

598,656

120.00 - 131.52
November 8, 2023 - March 13, 2026
5.37
1,928,815

758,568

132.00 - 202.33
October 23, 2023 - May 28, 2024
3.36
433,488

216,549

 
 
3.95
5,748,503

2,648,129
Summary of Stock Options that Remain Outstanding
The following table summarizes the stock options that remain outstanding as at June 30, 2020:
Exercise Price ($)
Expiry Date
Weighted Average Remaining Life
Options Outstanding (#)

Options Exercisable (#)

3.54 - 19.80
August 10, 2020 - June 24, 2025
2.61
96,383

72,949

21.72 - 83.88
August 9, 2020 - May 25, 2025
3.13
1,848,143

1,001,407

84.00 - 119.88
December 21, 2022 - September 19, 2024
3.35
1,441,674

598,656

120.00 - 131.52
November 8, 2023 - March 13, 2026
5.37
1,928,815

758,568

132.00 - 202.33
October 23, 2023 - May 28, 2024
3.36
433,488

216,549

 
 
3.95
5,748,503

2,648,129
Weighted Average Assumptions
Stock options granted during the respective periods highlighted below were fair valued based on the following weighted average assumptions:
 
Year ended
June 30, 2020

Year ended
June 30, 2019

Risk-free annual interest rate (1)
0.88
%
1.81
%
Expected annual dividend yield
0
%
0
%
Expected stock price volatility (2)
89.60
%
81.37
%
Expected life of options (years) (3)
2.37

2.96

Forfeiture rate
12.54
%
4.17
%
(1) 
The risk-free rate is based on Canada government bonds with a remaining term equal to the expected life of the options.
(2) 
Volatility was estimated by using the average historical volatility of the Company.
(3) 
The expected life in years represents the period of time that options granted are expected to be outstanding.

Summary of RSUs and DSUs Outstanding
A summary of the RSUs and DSUs outstanding are as follows:
 
RSUs and DSUs

Weighted Average
Issue Price of RSUs and DSUs

 
#

$

Balance, June 30, 2018
179,167

39.48

Issued
61,877

96.24

Vested, released and issued
(61,849
)
40.08

Forfeited
(10,000
)
50.04

Balance, June 30, 2019
169,195

59.28

Issued
266,640

37.82

Vested, released and issued
(44,823
)
50.58

Forfeited
(14,716
)
86.77

Balance, June 30, 2020
376,296

44.06

(1) 
As of June 30, 2020, there were 360,098 RSUs and 16,198 DSUs outstanding (June 30, 2019 - 166,778 RSUs and 2,417 DSUs).
The following table summarizes the RSUs and DSUs that remain outstanding as at June 30, 2020:
Weighted Average Issue Price ($)
Expiry Date
Outstanding (#)

Vested (#)

10.45 - 24.99
September 29, 2020 - February 10, 2025
209,322

23,516

25.00 - 88.67
August 3, 2021 - March 13, 2023
80,942

51,015

88.68 - 123.84
July 12, 2021 - January 15, 2023
86,032

27,025

 
 
376,296

101,556