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RELATED PARTY TRANSACTIONS (Schedule of Related Party Transactions) (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2019
Mar. 31, 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 612,000   0    
Board of director share based compensation 41,000 $ 9,000      
Operating lease liability 5,533,000        
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 1,020,000   1,536,000   $ 1,500,000
Operating lease right-of-use asset 4,921,000   0    
Operating lease liability 4,921,000   0    
K and R, LLC [Member] | Affiliated Entity [Member] | Prepaid expenses [Member]          
Related Party Transaction [Line Items]          
Expenses 43,000   43,000    
K and R, LLC [Member] | Affiliated Entity [Member] | Rent expense (property)          
Related Party Transaction [Line Items]          
Expenses 113,000 113,000      
K and R, LLC [Member] | Affiliated Entity [Member] | Interest expense [Member]          
Related Party Transaction [Line Items]          
Expenses 19,000 19,000      
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 3,000   3,000    
Affiliated Entity, LK Property Investments, LLC [Member] | Affiliated Entity [Member] | Rent expense (property)          
Related Party Transaction [Line Items]          
Expenses 9,000 9,000      
MetalX, LLC [Member] | Affiliated Entity [Member]          
Related Party Transaction [Line Items]          
Accounts receivable 24,000   $ 0    
Revenue from product sales & services $ 24,000 $ 0