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COMMITMENTS - Schedule of Future Minimum Lease Commitments under Operating Leases Excluding Property Taxes and Insurance (Details)
$ in Thousands
Dec. 31, 2018
USD ($)
Commitments And Contingencies Disclosure [Abstract]  
2019 $ 816
2020 584
2021 477
2022 409
2023 and after 528
Total $ 2,814