LOSS PER SHARE - Potentially Dilutive Awards (Details) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive awards (in shares)	12,143,874,000	13,929,753,000
Outstanding options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive awards (in shares)	3,343,883,000	3,330,206,000
Outstanding restricted share units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive awards (in shares)	1,816,851,000	456,675,000
Outstanding common share warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive awards (in shares)	6,983,140,000	10,142,872,000