Annual report pursuant to Section 13 and 15(d)

INCOME TAXES - Narrative (Details)

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INCOME TAXES - Narrative (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Operating Loss Carryforwards [Line Items]      
Net operating loss deferred tax asset reduction due to Section 382 limitation $ 0 $ 0 $ 63,573,000
Net operating loss deferred tax asset reduction due to changes from the CARES Act and finalized IRC regulations 12,494,000 0 0
Valuation allowance (337,494,000) (144,198,000)  
Interest or penalties expense 0 0 $ 0
Interest or penalties accrued 0 $ 0  
Federal      
Operating Loss Carryforwards [Line Items]      
Net operating loss carryforward 474,500,000    
Net operating losses with an indefnite life 161,700,000    
State and Local      
Operating Loss Carryforwards [Line Items]      
Net operating loss carryforward 649,300,000    
Net operating losses with an indefnite life $ 104,600,000