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INCOME TAXES - Schedule of Effective Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Loss before income taxes	$ (27,872)	$ (38,094)	$ (25,362)
Combined federal and provincial rate	26.50%	26.50%	26.50%
Expected income tax recovery	$ (7,385)	$ (10,095)	$ (6,721)
Share-based compensation	565	985	623
Other non-deductible/non-taxable items	1,985	(376)	597
Unrecognized deferred tax assets	4,835	9,486	5,501
Income tax expense	$ 0	$ 0	$ 0

X

- Definition

Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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