SHAREHOLDERS' EQUITY - Stock option activity (Details) - $ / shares	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Number of Stock Options
Outstanding, beginning of period	2,180,000	3,100,000
Granted	1,830,000	855,000
Exercised		(425,000)
Outstanding, end of period	4,010,000	3,530,000
Exercisable, end of period	2,605,000	2,300,000
Non-vested, end of period	1,405,000	1,230,000
Common shares issued on a net settlement basis	413,200
Weighted Average Exercise Price
Outstanding, beginning of period (in dollars per share)	$ 1.18	$ 0.28
Granted (in dollars per share)	1.40	2.25
Exercised (in dollars per share)		0.08
Outstanding, end of period (in dollars per share)	1.28	0.78
Exercisable, end of period (in dollars per share)	1.08	0.23
Non-vested, end of period (in dollars per share)	$ 1.65	$ 1.82