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OVERVIEW OF BUSINESS AND BASIS OF PRESENTATION Changes in Allowance for Doubtful Accounts (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Financing Receivable, Allowance for Credit Loss [Roll Forward]        
Beginning balance $ 1,383 $ 397 $ 255 $ 169
Bad debt expense (reversal) (151) (402) (1,326) (652)
Write-offs, net of recoveries (212) (227) (561) (249)
Ending balance $ 1,020 $ 572 $ 1,020 $ 572