SHARE CAPITAL - Fair value measurement assumptions (Details)	12 Months Ended
Dec. 31, 2020 USD ($) Y $ / shares	Dec. 31, 2019 USD ($) Y $ / shares	Dec. 31, 2018 USD ($) Y $ / shares
SHARE CAPITAL
Compensation expense \| $	$ 4,905,812	$ 3,189,808	$ 3,292,877
Weighted average fair value \| $	$ 1.99	$ 3.60	$ 16.40
Weighted average exercise price \| $ / shares	$ 2.48	$ 4.30	$ 30.30
Weighted average share price at grant \| $ / shares	$ 2.48	$ 4.30	$ 30.30
Dividend yield	0.00%	0.00%	0.00%
Volatility (as a percent)	124.00%	141.00%	72.00%
Risk-free interest rate (as a percent)	0.94%	1.51%	2.24%
Expected life (in years) \| Y	4	4	4
Forfeiture rate (as a percent)	7.00%	7.00%	7.00%

The expected volatility of the share price used to calculate the fair value of the share options granted. Expected volatility is a measure of the amount by which a price is expected to fluctuate during a period. The measure of volatility used in option pricing models is the annualised standard deviation of the continuously compounded rates of return on the share over a period of time.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The option life of share options granted.

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- Definition

The implied yield currently available on zero-coupon government issues of the country in whose currency the exercise price for share options granted is expressed, with a remaining term equal to the expected term of the option being valued (based on the option's remaining contractual life and taking into account the effects of expected early exercise). [Refer: Government [member]]

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The exercise price of share options granted.

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- Definition

The percentage of an expected dividend used to calculate the fair value of share options granted.

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- Definition

The amount of expense arising from share-based payment transactions in which the goods or services received did not qualify for recognition as assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2020-01-01
-Paragraph 51
-Subparagraph a
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- Definition

The weighted average fair value of share options granted during the period at the measurement date. [Refer: Weighted average [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The weighted average share price used as input to the option pricing model to calculate the fair value of share options granted. [Refer: Option pricing model [member]; Weighted average [member]]

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- Definition

The forfeiture rate of the share options used to calculate the fair value of the share options granted.

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