INCOME TAXES - Expected tax expense (Details) - USD ($)	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Relationship between expected tax expense and provincial income tax rate
Loss before income taxes	$ (24,802,377)	$ (29,219,098)	$ (35,102,222)
Statutory tax rate	27.00%	27.00%	27.00%
Recovery of income taxes based on the combined Canadian	$ (6,696,642)	$ (7,889,156)	$ (9,477,600)
Share-based remuneration	1,427,170	1,324,569	861,248
Unrealized gain on derivatives	(4,210,616)	(2,320,685)
Other permanent differences	1,461,840	(250,111)	190,097
Unrecognized deferred tax benefits	7,458,431	8,061,195	8,464,437
Difference in tax rates between foreign jurisdictions and Canada	646,509	550,131	(9,389)
Income tax (recovery)/ expense	86,692	(524,057)	28,793
Components of income tax expense
Current tax	$ 86,692	$ (524,057)	$ 28,793

The tax expense (income) divided by the accounting profit. [Refer: Accounting profit]

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The aggregate amount included in the determination of profit (loss) for the period in respect of current tax and deferred tax. [Refer: Current tax expense (income); Deferred tax expense (income)]

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The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that the entity does not separately disclose in the same statement or note. [Refer: Accounting profit; Applicable tax rate]

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The profit (loss) before tax expense or income. [Refer: Profit (loss)]

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The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to foreign tax rates. [Refer: Accounting profit]

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The amount representing the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to unrecognized deferred tax benefits.

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