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PROPERTY AND EQUIPMENT - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Abstract]    
Depreciation $ 3,504 $ 2,370
Property and equipment useful life (in years) 3 years  
Capitalized software development costs $ 2,780 $ 2,756