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DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION (Details) - USD ($)
$ in Thousands
Jan. 01, 2022
Sep. 30, 2021
Dec. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Additional paid in capital   $ (806,294) $ (534,744)
Accumulated deficit   $ 158,328 $ 51,186
Forecast | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2020-06      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Additional paid in capital $ 207,900    
Convertible debt 244,500    
Deferred income tax liabilities 62,300    
Accumulated deficit $ 25,700