COMMON STOCK WARRANTS - Narrative (Details) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2020	May 31, 2013
Class of Warrant or Right [Line Items]
Class of warrant (in shares)		110,000			644,365
Exercise price of warrants converted (in dollars per share)	$ 12.16	$ 110,000
Common Stock Warrants
Class of Warrant or Right [Line Items]
Class of warrant (in shares)	12,000	867,000	600,000	0
Warrants issued/granted (in shares)		644,000
Exercise price of warrants issued/granted (in dollars per share)		$ 23.64
Performance-based Warrants
Class of Warrant or Right [Line Items]
Warrants converted (in shares)			644,365