SHARE-BASED COMPENSATION PLANS - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Outstanding Stock Options
Beginning balance (in shares)	2,140,618	1,510,968
Granted (in shares)	1,712,000	1,023,000
Exercised (in shares)	0	0
Forfeited (in shares)	(174,442)	(393,350)
Ending balance (in shares)	3,678,176	2,140,618	1,510,968
Exercisable at end of period (in shares)	1,599,680
Weighted Average Exercise Price
Beginning balance (in dollars per share)	$ 15.01	$ 27.36
Granted (in dollars per share)	1.39	2.80
Exercised (in dollars per share)
Forfeited (in dollars per share)	10.41	30.66
Ending balance (in dollars per share)	8.89	$ 15.01	$ 27.36
Exercisable at end of period (in dollars per share)	$ 17.95
Outstanding Stock Options, Other Disclosures
Weighted-average remaining contractual term, outstanding (in years)	8 years 7 months 9 days	8 years 5 months 23 days	8 years 2 months 8 days
Weighted-average remaining contractual term, exercisable (in years)	7 years 7 months 2 days
Aggregate intrinsic value, outstanding	$ 0	$ 0	$ 379
Aggregate intrinsic value, exercisable	$ 0