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LEGAL MATTERS (Details) $ in Thousands |  | 1 Months Ended | 6 Months Ended
--- | --- | --- | ---
Feb. 01, 2016 USD ($) project | Jul. 31, 2018 USD ($) | Jun. 30, 2018 USD ($) | Jul. 31, 2018 USD ($)
Loss Contingencies |  |  |  |
Gain on settlement |  |  |  | $ 1,400
PPS Engineers, Inc. claims lawsuit |  |  |  |
Loss Contingencies |  |  |  |
Amount paid on settlement |  | $ 900 |  |
Gain on settlement |  |  |  | $ 1,400
PPS Engineers, Inc. claims lawsuit | Pending Litigation |  |  |  |
Loss Contingencies |  |  |  |
Amount of damages sought by plaintiff | $ 2,300 |  |  |
Number of significant project locations involved in the lawsuit | project | 1 |  |  |
Former subcontractor | GPS |  |  |  |
Loss Contingencies |  |  |  |
Amount of arbitration panel awarded |  |  | $ 5,200 |

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