WARRANTS - Summary of Share Purchase Warrants (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
WARRANTS
Number of Warrants, Beginning balance	23,016,000	6,520,000
Number Of Warrants, Warrants granted	$ 45,000	$ 18,484,000
Number of Warrants, Exercised for cash	(190,000)	(1,499,000)
Number of Warrants, Cashless exercised	(17,000)	(281,000)
Number of Warrants, Expired or cancelled	(190,000)	(208,000)
Number of Warrants, Ending balance	22,664,000	23,016,000	6,520,000
Weighted Average Exercise Price, Beginning Balance	$ 4.78	$ 6.11
Weighted Average Exercise Price, Warrants granted	$ 4.26	$ 4.45
Weighted Average Exercise Price, Exercised for cash	$ 3.99	$ 6.79
Weighted Average Exercise Price, Cashless exercised	2.38	4.03
Weighted Average Exercise Price, Expired or cancelled	13.63	4.00
Weighted Average Exercise Price, Ending Balance	$ 4.71	$ 4.78	$ 6.11
Weighted Average Remaining Contractual Life (in years)	3 years 3 months 29 days	4 years 3 months 15 days	3 years 1 month 28 days
Total Intrinsic Value	$ 954,000	$ 26,066,000	$ 1,733,000