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v3.19.2

SEGMENT INFORMATION (Details) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2019 USD ($) | Jun. 30, 2018 USD ($) | Jun. 30, 2019 USD ($) segment | Jun. 30, 2018 USD ($) | Dec. 31, 2018 USD ($)
Segment information |  |  |  |  |
Number of operating segments | segment |  |  | 1 |  |
Revenues derived from foreign subsidiaries |  |  | $ 82,485,000 | $ 74,698 |
Identifiable assets | $ 310,550,000 |  | $ 310,550,000 |  | $ 285,301,000
Total Revenue |  |  |  |  |
Segment information |  |  |  |  |
Percentage of concentration risk | 15.00% | 20.00% | 16.00% | 20.00% |
Trade receivables |  |  |  |  |
Segment information |  |  |  |  |
Percentage of concentration risk |  |  | 17.00% |  | 13.00%
Outside the United States |  |  |  |  |
Segment information |  |  |  |  |
Revenues derived from foreign subsidiaries | $ 38,802,000 | $ 38,395,000 |  |  |
Wholly owned foreign subsidiaries |  |  |  |  |
Segment information |  |  |  |  |
Revenues derived from foreign subsidiaries | 29,985,000 | $ 33,497,000 | $ 64,567,000 | $ 65,903,000 |
Identifiable assets | $ 93,952,000 |  | $ 93,952,000 |  | $ 88,400,000

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