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LONG-TERM DEBT (Schedule of Debt) (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]    
Total long-term debt $ 210 $ 1,010
Current portion of long-term debt (30) (648)
Long-term debt, net of current maturities 180 362
Department of Economic and Community Development (DECD)    
Debt Instrument [Line Items]    
Total long-term debt 226 233
Debt issuance cost (21) (22)
Financed Insurance Loan [Member]    
Debt Instrument [Line Items]    
Total long-term debt $ 5 12
Paycheck Protection Program    
Debt Instrument [Line Items]    
Total long-term debt   $ 787