INCOME TAXES - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Income Tax Contingency [Line Items]
Operating loss carryforwards	$ 142,200	$ 127,500
Operating loss carryforwards future expiration amount	69,900
Deferred tax assets, valuation allowance	83,197	$ 23,611
Section 382 In Penal Code
Income Tax Contingency [Line Items]
Operating loss carryforwards	$ 77,100