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LONG-TERM EMPLOYEE-RELATED OBLIGATIONS (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items] |  |  |
Severance payments actually paid | $ 96 | $ 230 | $ 166
Expected deposits to be made in the next fiscal year for severance and pension payment obligations | 900 |  |
Deposits made for severance payment obligations | 252 | 228 |
2018 | 1,142 |  |
2019 | 267 |  |
2020 | 54 |  |
2021 | 54 |  |
2022 | 13 |  |
Thereafter (through 2027) | 816 |  |
Total | 2,346 |  |
TAT and Turbochrome [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Severance pay expenses | 910 | 777 | 554
Limco Piedmont Inc [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
401(K) profit sharing plan contributions made by company | $ 350 | $ 344 | $ 261
Percentage of employees contribution matched by employer | 100.00% |  |
Percentage of employees contribution | 2.00% |  |
Percentage of employees contribution matched by employer, two | 50.00% |  |

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