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GEOGRAPHIC AND SEGMENT INFORMATION (Details) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2019 USD ($) segment | Dec. 31, 2018 USD ($)
Number of reportable operating segment | segment | 3 |
Long-term assets | $ 24,814 | $ 25,778
United States |  |
Long-term assets | $ 24,400 | $ 25,800
Percentage of assets (as a percent) | 100.00% |

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