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ALLOWANCE FOR DOUBTFUL ACCOUNTS (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Activity in the accounts receivable allowance from continuing operations    
Balance at beginning of period $ 225 $ 145
(Recoveries) bad debt expense   80
Bad debt (recoveries) expense (34)  
Write-offs (1)  
Balance at end of period $ 190 $ 225