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LEASES - Narrative (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Lessee, Lease, Description [Line Items]    
Operating lease, weighted-average discount rate 10.80%  
Operating lease, weighted-average remaining lease term 5 years 1 month 6 days  
Total lease liabilities $ 15.8 $ 15.8
Operating lease, right of use asset 9.7  
Operating lease cost 0.8  
Operating lease cash payments $ 0.9  
Maximum    
Lessee, Lease, Description [Line Items]    
Operating lease, remaining lease term 7 years  
Minimum    
Lessee, Lease, Description [Line Items]    
Operating lease, remaining lease term 1 year