LOSS PER SHARE - Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share [Abstract]
Net loss	$ (7,870)	$ (8,626)	$ (5,923)	$ (12,774)	$ (16,496)	$ (18,697)
Weighted-average number of common shares - basic (in shares)	145,168,510		139,936,443		145,079,859	139,817,622
Weighted-average number of common shares - basic (in shares)			109,435,643			108,833,622
Dilutive effect of stock options and awards (in shares)	0		0		0	0
Weighted-average number of proportionate voting shares - basic	0		76,252		0	77,460
Weighted-average number of common shares - diluted (in shares)	145,168,510		139,936,443		145,079,859	139,817,622
Weighted-average number of common shares - diluted (in shares)			109,435,643			108,833,622
Weighted-average number of proportionate voting shares - diluted	0		76,252		0	77,460
Loss per common share - basic (in usd per share)	$ (0.05)		$ (0.04)		$ (0.11)	$ (0.13)
Loss per common share - diluted (in usd per share)	(0.05)		(0.04)		(0.11)	(0.13)
Loss per proportionate voting share - basic (in usd per share)	0		(16.93)		0
Loss per proportionate voting share - diluted (in usd per share)	$ 0		$ (16.93)		$ 0	$ (53.49)