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COMMITMENTS AND CONTINGENCIES (Detail) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 USD ($) defendant lawsuit | Dec. 31, 2014 defendant patent | Jul. 31, 2007 death
Commitments and Contingencies Disclosure [Line Items] |  |  |
Number of defendants with cases settled | 2 |  |
Con Ed Matter |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |
Number of deaths | death |  |  | 1
Number of lawsuits | lawsuit | 83 |  |
Insurance coverage subject to deductible limit | $ | $ 250,000 |  |
Delaware Cases |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |
Number of defendants |  | 2 |
Washington Case |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |
Number of defendants |  | 1 |
Subsidiaries |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |
Number of defendants |  | 3 |
Quest Integrity |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |
Number of lawsuits | patent |  | 3 |
Con Ed Matter |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |
Liability accrual in excess of the deductible limit for the lawsuits | $ | $ 0 |  |

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