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Stockholders' Equity (Tables) | 6 Months Ended
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Jun. 30, 2016
Stockholders' Equity [Abstract] |
Schedule of activity under the stock option plans |
|  | 2000 Plan |  |  | 2010 Plan |  |  | Weighted Average Exercise |  |  | Aggregate Intrinsic Value |
Outstanding at December 31, 2013 |  |  | 157,500 |  |  |  | 73,500 |  |  | $ | 3.30 |  |  | $ | 223,000 |
Grants |  |  | 0 |  |  |  | 25,000 |  |  | $ | 4.69 |  |  |  |  |
Terminations |  |  | 0 |  |  |  | (2,000 | ) |  | $ | 5.75 |  |  |  |  |
Exercises |  |  | 0 |  |  |  | (1,000 | ) |  | $ | 3.15 |  |  |  |  |
Outstanding at December 31, 2014 |  |  | 157,500 |  |  |  | 95,500 |  |  | $ | 3.42 |  |  | $ | 364,000 |
Grants |  |  | 0 |  |  |  | 16,000 |  |  | $ | 7.40 |  |  |  |  |
Terminations |  |  | 0 |  |  |  | (3,000 | ) |  | $ | 4.95 |  |  |  |  |
Exercises |  |  | (26,000 | ) |  |  | (2,000 | ) |  | $ | 4.29 |  |  |  |  |
Outstanding at December 31, 2015 |  |  | 131,500 |  |  |  | 106,500 |  |  | $ | 3.57 |  |  | $ | 945,000 |
Grants |  |  | 0 |  |  |  | 37,000 |  |  | $ | 6.77 |  |  |  |  |
Terminations |  |  | 0 |  |  |  | (4,000 | ) |  | $ | 6.60 |  |  |  |  |
Exercises |  |  | 0 |  |  |  | (1,000 | ) |  | $ | 3.15 |  |  |  |  |
Outstanding at June 30, 2016 |  |  | 131,500 |  |  |  | 138,500 |  |  | $ | 3.96 |  |  | $ | 793,000 |
Exercisable at June 30, 2016 |  |  | 131,500 |  |  |  | 40,500 |  |  | $ | 2.90 |  |  | $ | 689,000 |
Reserved for future grants |  |  | 0 |  |  |  | 156,500 |  |  |  |  |  |  |  |  |
Schedule of fair value stock option grant using Black-Scholes option valuation model with the weighted-average assumptions |
|  | 2016 |  |  | 2015 |  |  | 2014 |
Risk-free interest rate |  |  | 2.0 | % |  |  | 2.0 | % |  |  | 2.0 | %
Dividend yield |  |  | 0 | % |  |  | 0 | % |  |  | 0 | %
Expected volatility |  |  | 47 | % |  |  | 47 | % |  |  | 49 | %
Expected life |  |  | 6 years |  |  |  | 6 years |  |  |  | 6 years |

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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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- 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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