STOCKHOLDERS' EQUITY, SHARE-BASED COMPENSATION AND NET LOSS PER SHARE - Narrative (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Mar. 03, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Nov. 20, 2020	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized (in shares)		100,000,000		100,000,000				100,000,000
Common stock, shares outstanding (in shares)		99,502,416		99,502,416				51,055,159
Shares of common stock outstanding (in shares)								10,359,079
Shares granted in period (in shares)		5,600,000
Share-based compensation expense		$ (0.4)	$ 0.1	$ 0.3	$ 0.3
Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares outstanding (in shares)						99,505,041
Warrants outstanding (in shares)						40,000
Common Stock | Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock outstanding (in shares)						15,700,000
Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares outstanding (in shares)		99,502,416	48,430,159	99,502,416	48,430,159		99,408,916	51,055,159	46,130,159	39,053,312
Option award expiration period				10 years
Aspire Capital Fund, LLC
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares issued (in shares)				48,238,893
Consideration received on sale of stock				$ 32.0
Aspire Capital Fund, LLC | Private Placement
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase amount of shares authorized	$ 30.0
Number of shares issued (in shares)	2,374,545
Number of shares issued (in shares)				44,227,890
Aspire Capital Fund, LLC | Private Placement | Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period of purchase stock	30 months