PROPERTY, PLANT AND EQUIPMENT - Additional Information (Detail) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Property, Plant and Equipment [Line Items] | ||
| Depreciation | $ 100 | $ 100 |
| Impairment Of Property, Plant and Equipment, Reserve | $ 0 | $ (82) |