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SHAREHOLDERS' EQUITY (Tables) | 12 Months Ended
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Dec. 31, 2015
Equity [Abstract] |
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] | The following is a summary of the status of the 1998 Plan, 2000 plan and 2011 Share Incentive Plan as of December 31, 2015, 2014 and 2013, and changes during the years ended on those dates:
| 1) |
|  | Years ended December 31 |
|  | 2015 |  | 2014 |  | 2013 |
|  | Number |  | Weighted average exercise price |  | Number |  | Weighted average exercise price |  | Number |  | Weighted average exercise price |
Options outstanding at beginning of year |  |  | 851,600 |  | $ | 2.63 |  |  | 460,000 |  | $ | 1.93 |  |  | 588,700 |  | $ | 1.87 |
Changes during year: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted (a) |  |  | 116,800 |  | $ | 1.66 |  |  | 666,000 |  | $ | 2.81 |  |  | 96,000 |  | $ | 2.16 |
Exercised |  |  | (92,100) |  | $ | 1.85 |  |  | (225,400) |  | $ | 1.88 |  |  | (103,500) |  | $ | 0.70 |
Forfeited |  |  | (166,000) |  | $ | 2.88 |  |  | (49,000) |  | $ | 2.03 |  |  | (36,000) |  | $ | 1.94 |
Expired |  |  | - |  |  | - |  |  | - |  |  | - |  |  | (85,200) |  | $ | 3.24 |
Options outstanding at end of year |  |  | 710,300 |  | $ | 2.51 |  |  | 851,600 |  | $ | 2.63 |  |  | 460,000 |  | $ | 1.93 |
Options exercisable at end of year |  |  | 51,000 |  | $ | 1.98 |  |  | 43,600 |  | $ | 2.00 |  |  | 193,000 |  | $ | 1.95 |
Weighted average grant date fair value of options granted during the year (b) |  |  |  |  |  | 0.94 |  |  |  |  | $ | 0.51 |  |  |  |  | $ | 0.41 |
(a) In the years ended December 31, 2015 and 2014 the options were granted with an exercise price equal to the average closing price per share of the Company’s ordinary shares on the stock market during the 30 trading day period immediately preceding the date of grant of such option or with an exercise price equal to par value of NIS 0.01. In the year ended December 31, 2013 the options were granted with an exercise price equal to the average closing price per share of the Company ordinary’s shares on the stock market during the 30 trading day period immediately preceding the date of grant of such option.
| (b) | The fair value of each stock option granted is computed on the date of grant according to the Black-Scholes option-pricing model with the following assumptions:
|  | Years ended December 31 |
|  | 2015 |  |  | 2014 |  |  | 2013 |
Dividend yield |  |  | 10 | % |  |  | 11 | % |  |  | 11 | %
Expected volatility* |  |  | 48 | % |  |  | 44 | % |  |  | 49 | %
Average risk-free interest rate |  |  | 1.5 | % |  |  | 1.5 | % |  |  | 0.8 | %
Expected average term - in years |  |  | 3.88 |  |  |  | 3.88 |  |  |  | 3.88 |
| * | Volatility is based on historical volatility of the Company's share price for periods matching the expected term of the option until exercise.
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] |
| 2) | The following table summarizes information about options outstanding and exercisable as of December 31, 2015:
|  | Options Outstanding |  | Options Exercisable |
|  | Number |  | Weighted |  |  |  |  | Number |  | Weighted |  |  |  |
|  | outstanding |  | average |  | Weighted |  | exercisable |  | average |  | Weighted |
Range of |  | at |  | remaining |  | average |  | at |  | remaining |  | average |
exercise |  | December 31, |  | contractual |  | exercise |  | December 31, |  | contractual |  | exercise |
prices |  | 2015 |  | life |  | price |  | 2015 |  | life |  | price |
|  |  |  |  | Years |  |  |  |  |  |  |  | Years |  |  |  |
$ | 0.003 – 1.939 |  |  | 118,800 |  |  | 2.74 |  | $ | 0.72 |  |  | 44,000 |  |  | 0.85 |  | $ | 1.94 |
$ | 2.16 – 2.947 |  |  | 591,500 |  |  | 3.73 |  | $ | 2.87 |  |  | 7,000 |  |  | 1.74 |  | $ | 2.27 |
|  |  |  | 710,300 |  |  | 3.56 |  | $ | 2.51 |  |  | 51,000 |  |  | 0.97 |  | $ | 1.98 |

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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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