WARRANTS (Tables) - Common stock purchase warrants

12 Months Ended

Dec. 31, 2019

Schedule of share purchase warrants

				Weighted Average
	Number of	Weighted Average		Remaining Contractual	Total Intrinsic
	Warrants	Exercise Price		Life (in years)	Value
Balance - January 1, 2018	6,520,000	$	6.11	3.16	$	1,733,000
Warrants granted	18,484,000		4.45	—		—
Exercised for cash	(1,499,000)		6.79	—		—
Cashless exercised	(281,000)		4.03	—		—
Expired or cancelled	(208,000)		4.00	—		—
Balance - December 31, 2018	23,016,000		4.78	4.29		26,066,000
Warrants granted	45,000		4.26	—		—
Exercised for cash	(190,000)		3.99	—		—
Cashless exercise	(17,000)		2.38	—		—
Expired or cancelled	(190,000)		13.63	—		—
Balance - December 31, 2019	22,664,000	$	4.71	3.33	$	954,000

Schedule of valuation methodology

	Weighted Average Inputs
	Before			After
	Modification			Modification
Exercise price	$	9.93		$	2.50
Contractual term (years)		2.37			2.37
Volatility (annual)		79	%		79	%
Risk-free rate		1.5	%		1.5	%
Dividend yield (per share)		0	%		0	%