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INCOME TAXES - Schedule of Effective Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Loss before income taxes	$ (38,094)	$ (25,362)	$ (27,990)
Combined federal and provincial rate	26.50%	26.50%	26.50%
Expected income tax recovery	$ (10,095)	$ (6,721)	$ (7,400)
Stock based compensation	985	623	934
Other non-deductible/non-taxable items	(376)	597	(1,303)
Foreign tax rate differences	0	0	0
Unrecognized deferred tax assets	9,486	5,501	7,769
Income tax expense	$ 0	$ 0	$ 0

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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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