WARRANTS - Warrants and Rights Outstanding, Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021	Jul. 31, 2018
Class of Warrant or Right [Line Items]
Outstanding, beginning of period (in shares)	0
Outstanding, end of period (in shares)	0
October 2015/ March 2016
Class of Warrant or Right [Line Items]
Number of warrants (in shares)	2,103,930
Exercise price (in dollars per share)	$ 100
Outstanding, beginning of period (in shares)	0	717,225
Exercises during the period (in shares)	0	0
Outstanding, end of period (in shares)	0	717,225
Fair value of warrants or rights	$ 0
October 2016
Class of Warrant or Right [Line Items]
Number of warrants (in shares)	157,580
Exercise price (in dollars per share)	$ 70.00
Outstanding, beginning of period (in shares)	0	157,580
Exercises during the period (in shares)	0	0
Outstanding, end of period (in shares)	0	157,580
Fair value of warrants or rights	$ 0
July 2018 - Allotment 1
Class of Warrant or Right [Line Items]
Number of warrants (in shares)	122,735		122,735
Exercise price (in dollars per share)	$ 1,280		$ 1.28
July 2018 - Allotment 2
Class of Warrant or Right [Line Items]
Number of warrants (in shares)	184,100		184,100
Exercise price (in dollars per share)	$ 1,280		$ 1.28
July 2018
Class of Warrant or Right [Line Items]
Outstanding, beginning of period (in shares)	30,684	306,835
Exercises during the period (in shares)	25,570	0
Outstanding, end of period (in shares)	5,114	306,835
Fair value of warrants or rights	$ 3