REDEEMABLE PREFERRED STOCK - Series A Preferred Stock Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		54 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Jan. 31, 2020
Class of Stock [Line Items]
Redeemable preferred stock dividends	$ 57	$ 161
Reclassification of Series A Preferred Stock from temporary equity to permanent equity	8,243	6,948	$ 108,700
Registration Statement
Class of Stock [Line Items]
Warrant right to purchase a share of common stock (in shares)				0.25
Series A Preferred Stock
Class of Stock [Line Items]
Reclassification of Series A Preferred Stock from temporary equity to permanent equity	$ 8,243	$ 6,948
Series A Preferred Stock | Registration Statement
Class of Stock [Line Items]
Preferred stock, par value (in usd per share)				$ 0.001
Preferred stock, stated value (in usd per share)				$ 25.00