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STOCKHOLDERS' EQUITY (Tables)

6 Months Ended

Jun. 30, 2020

STOCKHOLDERS' EQUITY

Schedule of share purchase warrants

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​	​	​	​	​	​	​	​	​	​	​
​		​		​	​	​	Weighted Average	​	​
​	​	Number of	​	Weighted Average		​	Remaining Contractual	​	Total Intrinsic
​		Warrants		Exercise Price		​	Life (in years)	​	Value
Balance - January 1, 2020		22,664,000	​	$	4.71	​	3.33	​	$	954,000
Exercised for cash	​	(458,000)	​	​	1.20	​	—	​		—
Expired or cancelled	​	(825,000)	​	​	7.10	​	—	​		—
Balance - June 30, 2020	​	21,381,000	​	$	4.69	​	3.03	​	$	—

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Tabular disclosure of share purchase warrants.

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