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EXPANSION INTO CHINA (Details) - USD ($) $ in Millions | May 31, 2017 | Aug. 31, 2017 | Apr. 30, 2017
--- | --- | --- | ---
Noncontrolling Interest [Line Items] |  |  |
Planned amount of investment in new facility | $ 160 |  |
Investment funding term | 5 years |  |
FPD Manufacturing Facility [Member] | Subsequent Event [Member] | Minimum [Member] |  |  |
Noncontrolling Interest [Line Items] |  |  |
Planned amount of investment in new facility |  | $ 160 |
DNP [Member] |  |  |
Noncontrolling Interest [Line Items] |  |  |
Ownership percentage of noncontrolling interests | 49.99% |  | 49.99%
PLAB Singapore [Member] |  |  |
Noncontrolling Interest [Line Items] |  |  |
Ownership percentage in joint venture |  | 50.01% |

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