STOCKHOLDERS' EQUITY - Share Purchase Warrants (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
STOCKHOLDERS' EQUITY
Number of Warrants, Beginning balance	22,664,000
Number of Warrants, Exercised for cash	(458,000)
Number of Warrants, Expired or cancelled	(1,242,000)
Number of Warrants, Ending balance	20,964,000	22,664,000
Weighted Average Exercise Price, Beginning Balance	$ 4.71
Weighted Average Exercise Price, Exercised for cash	1.20
Weighted Average Exercise Price, Expired or cancelled	9.75
Weighted Average Exercise Price, Ending Balance	$ 4.49	$ 4.71
Weighted Average Remaining Contractual Life (in years)	2 years 10 months 2 days	3 years 3 months 29 days
Total Intrinsic Value		$ 954,000