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, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
INCOME TAXES [Line Items]        
Tax Cuts and Jobs Act of 2017, provisional income tax expense (benefit) $ (3,200,000)      
Deferred tax liabilities, non-NOL deferred tax assets which convert to indefinite-lived 3,200,000   $ 3,200,000  
Effective income tax rate, percentage     (289.00%)  
Operating loss carryforwards   $ 33,800,000    
Deferred tax assets, gross $ 36,174,441 $ 34,048,515 $ 36,174,441  
Original useful life   15 years    
Statutory tax rate (as percent)   21.00% 34.00% 34.00%
Valuation allowance increase (decrease)     $ (3,200,000)  
Epsilor-EFL Subsidiary        
INCOME TAXES [Line Items]        
Operating loss carryforwards   $ 90,100,000    
Minimum        
INCOME TAXES [Line Items]        
Operating loss carryforwards, expiration date   2021    
Maximum        
INCOME TAXES [Line Items]        
Operating loss carryforwards, expiration date     2037  
Epsilor-EFL Subsidiary        
INCOME TAXES [Line Items]        
Statutory tax rate (as percent)   24.00% 24.00% 25.00%