LEASES - Narrative (Details) $ in Thousands						1 Months Ended	2 Months Ended	3 Months Ended		9 Months Ended
	Nov. 01, 2020 USD ($)	Oct. 01, 2020 USD ($)	Sep. 01, 2020 USD ($)	Aug. 03, 2020 USD ($) installment	Apr. 09, 2020 USD ($)	Aug. 31, 2020 USD ($)	Nov. 01, 2020 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Cash paid for operating lease liabilities										$ 200	$ 1,500
Weighted-average remaining lease term								22 months		22 months
Weighted-average discount rate								13.00%		13.00%
Right of use asset								$ 385		$ 385		$ 4,359
Lease liability								466		466		7,500
Gain on lease termination								2,044	$ 0	3,582	$ 0
Damages sought					$ 1,100
Prepaid lease expense								300		300
Office Space
Lessee, Lease, Description [Line Items]
Right of use asset								400		400
Lease liability								500		500
Operating lease assets										3,800
Decrease in operating lease liabilities										5,300
Gain on lease termination						$ 2,000				1,500
Hughes Center Lease Settlement
Lessee, Lease, Description [Line Items]
Payments for legal settlements			$ 150	$ 450
Number of payment installments | installment				3
Loss contingency accrual								$ 300		$ 300		$ 2,300
Hughes Center Lease Settlement | Forecast
Lessee, Lease, Description [Line Items]
Payments for legal settlements	$ 150	$ 150					$ 600