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SHAREHOLDERS' EQUITY (Stock Option Plans TAT Technology) (Details) $ / shares in Units, $ in Thousands | 1 Months Ended | 12 Months Ended |  |  |  |  |  |  |  |  |
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Jun. 30, 2012 | Jun. 28, 2012 ₪ / shares shares | Dec. 31, 2020 USD ($) $ / shares shares | Dec. 31, 2019 USD ($) $ / shares shares | Dec. 31, 2018 USD ($) $ / shares shares | Dec. 31, 2020 ₪ / shares | Dec. 31, 2019 ₪ / shares | Sep. 26, 2019 $ / shares shares | Sep. 22, 2019 $ / shares shares | Aug. 29, 2019 $ / shares shares | Nov. 22, 2018 $ / shares shares | May 13, 2018 $ / shares shares | Feb. 28, 2018 $ / shares shares | Feb. 06, 2018 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ordinary shares, par value per share | ₪ / shares |  |  |  |  |  | ₪ 0.9 | ₪ 0.9 |  |  |  |  |  |  |
Incremental cost | $ |  |  |  |  | $ 74 |  |  |  |  |  |  |  |  |
Number of options |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options, beginning |  |  | 571,460 | 528,268 | 365,000 |  |  |  |  |  |  |  |  |
Options, Granted |  |  | 50,000 | 170,000 | 273,893 |  |  |  |  |  |  |  |  |
Options, Forfeited |  |  |  | (126,808) | (83,957) |  |  |  |  |  |  |  |  |
Options, Exercised |  |  |  |  | (26,668) |  |  |  |  |  |  |  |  |
Options, ending |  |  | 621,460 | 571,460 | 528,268 |  |  |  |  |  |  |  |  |
Exercisable at end of year |  |  | 381,629 | 264,389 | 163,438 |  |  |  |  |  |  |  |  |
Weighted average exercise price |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options, beginning | $ / shares |  |  | $ 7.53 | $ 9.03 | $ 8.53 |  |  |  |  |  |  |  |  |
Options, Granted | $ / shares |  |  | 4.58 | 5.44 | 9.70 |  |  |  |  |  |  |  |  |
Options, Forfeited | $ / shares |  |  |  | 11.19 | 9.85 |  |  |  |  |  |  |  |  |
Options, Exercised | $ / shares |  |  |  |  | 7.15 |  |  |  |  |  |  |  |  |
Options, ending | $ / shares |  |  | 7.26 | 7.53 | 9.03 |  |  |  |  |  |  |  |  |
Exercisable at end of year | $ / shares |  |  | 7.91 | 7.74 | 8.34 |  |  |  |  |  |  |  |  |
Weighted-average grant-date fair value of options granted | $ / shares |  |  | $ 1.41 | $ 1.35 | $ 1.83 |  |  |  |  |  |  |  |  |
2012 Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares authorized for the plan |  | 380,000 |  |  |  |  |  | 50,000 | 50,000 | 50,000 | 50,000 | 70,000 | 50,000 | 3,893
Vesting period for plan | 3 years | 4 years |  |  |  |  |  |  |  |  |  |  |  |
Ordinary shares, par value per share | ₪ / shares |  | ₪ 0.9 |  |  |  |  |  |  |  |  |  |  |  |
Exercise price | $ / shares |  |  |  |  |  |  |  | $ 5.26 | $ 5.32 | $ 5.65 | $ 7.35 | $ 9.12 | $ 10.74 | $ 11.11
Dividend yield |  |  | 0.00% | 0.00% |  |  |  |  |  |  |  |  |  |
Weighted average exercise price |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate intrinsic value | $ |  |  | $ 0 | $ 0 | $ 737 |  |  |  |  |  |  |  |  |
Unrecognized compensation cost related to non-vested stock options | $ |  |  | $ 176 |  |  |  |  |  |  |  |  |  |  |
Unrecognized compensation weighted average period of recognition, years |  |  | 2018 years |  |  |  |  |  |  |  |  |  |  |
Period in which equity exceeds threshold | 4 years |  |  |  |  |  |  |  |  |  |  |  |  |
2012 Plan [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares authorized for the plan |  | 300,000 |  |  | 300,000 |  |  |  |  |  |  |  |  |
Expected stock price volatility |  |  | 44.70% | 34.20% | 32.60% |  |  |  |  |  |  |  |  |
Expected option life (in years) |  |  | 3 years 6 months | 3 years 6 months | 3 years 6 months |  |  |  |  |  |  |  |  |
Risk free interest rate |  |  | 0.12% | 1.44% | 1.71% |  |  |  |  |  |  |  |  |
Dividend yield |  |  |  |  | 0.00% |  |  |  |  |  |  |  |  |
2012 Plan [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares authorized for the plan |  | 980,000 |  |  | 980,000 |  |  |  |  |  |  |  |  |
Expected stock price volatility |  |  | 43.50% | 36.80% | 40.80% |  |  |  |  |  |  |  |  |
Expected option life (in years) |  |  | 5 years | 5 years | 5 years 6 months |  |  |  |  |  |  |  |  |
Risk free interest rate |  |  | 0.25% | 1.63% | 2.87% |  |  |  |  |  |  |  |  |
Dividend yield |  |  |  |  | 5.00% |  |  |  |  |  |  |  |  |
2012 Plan [Member] | Vest upon the lapse of 12 months [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting percentage |  | 25.00% |  |  |  |  |  |  |  |  |  |  |  |
2012 Plan [Member] | Vest on a quarterly basis [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period for plan |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |
Vesting percentage |  | 75.00% |  |  |  |  |  |  |  |  |  |  |  |

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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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