STOCKHOLDERS' EQUITY DEFICIT - Warrants Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended		12 Months Ended
	Oct. 31, 2019	Jun. 30, 2020	Dec. 31, 2019	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Sep. 30, 2019	Jun. 30, 2019
Class of Warrant or Right [Line Items]
Increase in warrant value	$ 1,100		$ 1,100
Exercise price per warrant (in dollars per share)								$ 1.47
Proceeds from exercises of common stock warrants				$ 0	$ 1,126	$ 131
Exercise of stock warrants (in shares)				0
Deemed dividend		$ 100
Common Stock
Class of Warrant or Right [Line Items]
Exercise of stock warrants (in shares)					2,048,059	238,110
2018 Warrants
Class of Warrant or Right [Line Items]
Exercise price per warrant (in dollars per share)				$ 0.55
Exercise of stock warrants (in shares)				0
2018 Warrants | Common Stock
Class of Warrant or Right [Line Items]
Exercise price per warrant (in dollars per share)	$ 0.60	$ 0.55					$ 1.20
Proceeds from exercises of common stock warrants	$ 2,000
Exercise of stock warrants (in shares)	3,400,000
2017 Warrants
Class of Warrant or Right [Line Items]
Exercise price per warrant (in dollars per share)				$ 0.55
Exercise of stock warrants (in shares)				0
2017 Warrants | Common Stock
Class of Warrant or Right [Line Items]
Exercise price per warrant (in dollars per share)	$ 0.55						0.80
2018 Warrant Amendment, Amendment to Securities Purchase Agreement
Class of Warrant or Right [Line Items]
Minimum percentage of securities issued	50.10%
2018 Warrant Amendment, Amendment to Securities Purchase Agreement | Common Stock
Class of Warrant or Right [Line Items]
Exercise price per warrant (in dollars per share)	$ 0.95						$ 1.20