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LEASES - Maturity of remaining lease liabilities - operating lease (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
LEASES    
Remaining 2020 $ 802 $ 1,643
2021 1,527 1,527
2022 1,359 1,359
2023 844 844
2024 631 631
Thereafter 985 981
Total lease payments 6,148 6,985
Less: Interest (389) (467)
Present value of lease liabilities $ 5,759 $ 6,518