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PROPERTY AND EQUIPMENT, NET - Narrative (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2019
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Abstract]        
Depreciation expense     $ 1,600 $ 1,200
Loss on disposal $ 900 $ 10,100 $ 1,588 $ 10,076
Property plant and equipment disposals   9,600    
Disposal costs   $ 500