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LEASES - Future Minimum Lease Payment Obligations Under Capital Leases (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Leases [Abstract]    
2021 $ 293  
2022 391  
2023 391  
2024 391  
2025 409  
2026 and thereafter 2,840  
Total minimum lease payments 4,715  
Less: amount representing interest (927)  
Present value of net minimum lease payments $ 3,788 $ 3,849