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RELATED PARTY TRANSACTIONS (Schedule of Related Party Transactions) (Details) - USD ($)
6 Months Ended 12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Jun. 23, 2017
Feb. 29, 2016
Related Party Transaction [Line Items]          
Accounts payable $ 2,000   $ 2,000    
Notes Payable, Related Parties       $ 129,000.0  
Operating lease right-of-use asset 4,881,000   0    
Board of director share based compensation 98,000 $ 23,000      
Operating lease liability 5,477,000        
K and R, LLC [Member] | Affiliated Entity [Member]          
Related Party Transaction [Line Items]          
Deposits (included in other long-term assets) 42,000   42,000    
Notes Payable, Related Parties 1,004,000   1,536,000   $ 1,500,000
Operating lease right-of-use asset 4,881,000   0    
Operating lease liability 4,881,000   0    
K and R, LLC [Member] | Affiliated Entity [Member] | Prepaid expenses [Member]          
Related Party Transaction [Line Items]          
Expenses 38,000   43,000    
K and R, LLC [Member] | Affiliated Entity [Member] | Rent expense (property)          
Related Party Transaction [Line Items]          
Expenses 225,000 225,000      
K and R, LLC [Member] | Affiliated Entity [Member] | Interest expense [Member]          
Related Party Transaction [Line Items]          
Expenses 36,000 38,000      
Affiliated Entity, LK Property Investments, LLC [Member] | Affiliated Entity [Member]          
Related Party Transaction [Line Items]          
Deposits (included in other long-term assets) 3,000   3,000    
Accounts payable 2,000   2,000    
Affiliated Entity, LK Property Investments, LLC [Member] | Affiliated Entity [Member] | Prepaid expenses [Member]          
Related Party Transaction [Line Items]          
Expenses 11,000   $ 3,000    
Affiliated Entity, LK Property Investments, LLC [Member] | Affiliated Entity [Member] | Rent expense (property)          
Related Party Transaction [Line Items]          
Expenses 22,000 18,000      
MetalX, LLC [Member] | Affiliated Entity [Member]          
Related Party Transaction [Line Items]          
Revenue from product sales & services $ 49,000 $ 0