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LEASES - Annual Maturities of Lease Liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Leases [Abstract]    
2019 $ 549  
2020 802  
2021 824  
2022 624  
2023 550  
2025 and thereafter 546  
Total undiscounted lease payments 3,895  
Imputed interest 503  
Total lease liabilities $ 3,392 $ 3,529