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COMMITMENTS AND CONTINGENCIES - Future Minimum Lease Payments (Details)
$ in Thousands
Dec. 31, 2018
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
2019 $ 1,637
2020 1,353
2021 1,234
2022 1,258
2023 1,315
Thereafter 3,831
Total $ 10,628