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Stockholders' Equity (Tables) | 3 Months Ended
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Mar. 31, 2018
Stockholders' Equity [Abstract] |
Schedule of activity under the stock option plans |
|  | 2000 Plan |  |  | 2010 Plan |  |  | 2017 Plan |  |  | Weighted Average Exercise Price |  |  | Aggregate Intrinsic Value(1) |
Outstanding at December 31, 2016 |  |  | 126,500 |  |  |  | 124,500 |  |  |  | - |  |  | $ | 3.89 |  |  | $ | 516,990 |
Grants |  |  | - |  |  |  | 141,000 |  |  |  | - |  |  | $ | 5.92 |  |  |  |  |
Terminations |  |  | (5,000 | ) |  |  | (16,000 | ) |  |  | - |  |  | $ | 5.68 |  |  |  |  |
Exercises |  |  | (4,000 | ) |  |  | (7,000 | ) |  |  | - |  |  | $ | 3.47 |  |  |  |  |
Outstanding at December 31, 2017 |  |  | 117,500 |  |  |  | 242,500 |  |  |  | - |  |  | $ | 4.58 |  |  | $ | 1,513,980 |
Grants |  |  | - |  |  |  | 34,500 |  |  |  | 102,500 |  |  | $ | 7.38 |  |  |  |  |
Terminations |  |  | - |  |  |  | (9,000 | ) |  |  | (5,000 | ) |  | $ | 6.27 |  |  |  |  |
Exercises |  |  | (5,000 | ) |  |  | (1,000 | ) |  |  | - |  |  | $ | 3.19 |  |  |  |  |
Outstanding at March 31, 2018 |  |  | 112,500 |  |  |  | 267,000 |  |  |  | 97,500 |  |  | $ | 5.36 |  |  | $ | 783,750 |
Vested at March 31, 2018 |  |  | 112,500 |  |  |  | 36,500 |  |  |  | - |  |  | $ | 2.59 |  |  | $ | 656,460 |
Vested and expected to vest at March 31, 2018 |  |  | 112,500 |  |  |  | 267,000 |  |  |  | 97,500 |  |  | $ | 5.36 |  |  | $ | 783,750 |
Reserved for future grants |  |  | - |  |  |  | 5,000 |  |  |  | 202,500 |  |  |  |  |  |  |  |  |
Schedule of fair value stock option grant using black-scholes option valuation model with the weighted-average assumptions |
|  | For the Three-Month Period Ended March 31, 2018 |  |  | For the Year Ended December 31, 2017 |
Risk-free interest rate |  |  | 2.5 | % |  |  | 1.9 | %
Dividend yield |  |  | 0 | % |  |  | 0 | %
Expected volatility |  |  | 57 | % |  |  | 61 | %
Expected life |  |  | 6.5 years |  |  |  | 6.5 years |

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: 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=96867065&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=96867065&loc=d3e5070-113901 + Details
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