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SHAREHOLDERS' EQUITY (Tables) | 12 Months Ended
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Dec. 31, 2018
Stockholders' Equity Note [Abstract] |
Schedule of Stock Options Assumptions | The fair value of the Company’s stock options granted under the 2012 plan for the years ended December 31, 2018, 2017 and 2016 was estimated using the following assumptions:
|  | 2018 |  | 2017 |  | 2016
Expected stock price volatility |  | 32.6% – 40.8% |  | 33.3% – 40.5% |  | 37.7% – 40.3%
Expected option life (in years) |  | 3.5-5.5 |  | 4 – 5.5 |  | 3 – 5.5
Risk free interest rate |  | 1.71% – 2.87% |  | 1.49% – 1.81% |  | 0.92% – 1.79%
Dividend yield |  | 0% - 5% |  | 5% |  | 5%
Schedule of Stock Option Activity |
The following table is a summary of the activity of TAT's Stock Option plan:
|  | Year ended December 31, |  |  | Year ended December 31, |  |  | Year ended December 31, |
|  | 2018 |  |  | 2017 |  |  | 2016 |
|  | Number of options |  |  | Weighted average exercise price |  |  | Number of options |  |  | Weighted average exercise price |  |  | Number of options |  |  | Weighted average exercise price |
Outstanding at the beginning of the year |  |  | 331,042 |  |  | $ | 9.03 |  |  |  | 330,000 |  |  | $ | 7.97 |  |  |  | 277,500 |  |  | $ | 7.60 |
Granted |  |  | 273,893 |  |  |  | 9.70 |  |  |  | 75,000 |  |  |  | 10.39 |  |  |  | 250,000 |  |  |  | 8.10 |
Forfeited |  |  | (83,958 | ) |  |  | 9.21 |  |  |  | (54,375 | ) |  |  | 8.35 |  |  |  | (177,400 | ) |  |  | 7.56 |
Exercised |  |  | (26,668 | ) |  |  | 7.15 |  |  |  | (19,583 | ) |  |  | 7.3 |  |  |  | (20,100 | ) |  |  | 6.50 |
Outstanding at the end of the year |  |  | 494,309 |  |  |  | 10.01 |  |  |  | 331,042 |  |  | $ | 9.03 |  |  |  | 330,000 |  |  | $ | 7.97 |
Exercisable at the end of the year |  |  | 163,438 |  |  | $ | 8.34 |  |  |  | 120,417 |  |  | $ | 7.95 |  |  |  | 20,000 |  |  | $ | 7.15 |

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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 (d) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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