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LEASES - Other Information (Details)
Sep. 30, 2021
Dec. 31, 2020
LEASES [Abstract]    
Operating leases (in years) 1 year 8 months 12 days 1 year 10 months 24 days
Finance leases (in years) 3 years 2 months 12 days 3 years 7 months 6 days
Operating leases discount rate 8.00% 8.00%
Finance leases discount rate 18.84% 8.28%