Annual report pursuant to Section 13 and 15(d)

INCOME TAXES Narrative (Details)

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INCOME TAXES Narrative (Details) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Operating Loss Carryforwards [Line Items]        
Valuation allowance $ 41,492,000 $ 41,492,000 $ 37,869,000  
Unrecognized tax benefits, penalties and accrued interest 100,000 100,000    
Income tax benefit   (731,000) 2,940,000 $ (122,665,000)
Domestic Tax Authority        
Operating Loss Carryforwards [Line Items]        
Operating loss carryforwards 0 0 0  
State and Local Jurisdiction        
Operating Loss Carryforwards [Line Items]        
Operating loss carryforwards 388,700,000 388,700,000 377,700,000  
Valuation allowance 19,700,000 19,700,000    
Foreign Tax Authority        
Operating Loss Carryforwards [Line Items]        
Operating loss carryforwards 63,200,000 63,200,000 $ 56,900,000  
Tax credit carryforward 600,000 600,000    
Valuation allowance 21,800,000 21,800,000    
Aeroleo        
Operating Loss Carryforwards [Line Items]        
Valuation allowance 19,900,000 19,900,000    
Aeroleo | Foreign Tax Authority        
Operating Loss Carryforwards [Line Items]        
Income tax benefit 3,500,000      
Sicher        
Operating Loss Carryforwards [Line Items]        
Valuation allowance 1,300,000 1,300,000    
Foreign Tax Credit | Foreign Tax Authority        
Operating Loss Carryforwards [Line Items]        
Valuation allowance $ 600,000 $ 600,000