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Stockholders' Equity (Tables) | 6 Months Ended
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Jun. 30, 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 |  |  | - |  |  |  | 38,500 |  |  |  | 106,500 |  |  | $ | 7.35 |  |  |  |  |
Terminations |  |  | - |  |  |  | (9,000 | ) |  |  | (5,000 | ) |  | $ | 6.27 |  |  |  |  |
Exercises |  |  | (10,000 | ) |  |  | (1,000 | ) |  |  | - |  |  | $ | 3.26 |  |  |  |  |
Outstanding at June 30, 2018 |  |  | 107,500 |  |  |  | 271,000 |  |  |  | 101,500 |  |  | $ | 5.40 |  |  | $ | 680,620 |
Vested at June 30, 2018 |  |  | 107,500 |  |  |  | 37,500 |  |  |  | - |  |  | $ | 2.60 |  |  | $ | 611,810 |
Vested and expected to vest at June 30, 2018 |  |  | 107,500 |  |  |  | 271,000 |  |  |  | 101,500 |  |  | $ | 5.40 |  |  | $ | 680,620 |
Reserved for future grants |  |  | - |  |  |  | 1,000 |  |  |  | 198,500 |  |  |  |  |  |  |  |  |
(1) | Intrinsic value is the difference between the fair market value as of the date indicated and as of the date of the option grant.
Schedule of fair value stock option grant using black-scholes option valuation model with the weighted-average assumptions |
|  | For the Three-Month Period Ended June 30, 2018 |  | For the Six-Month Period Ended June 30, 2018 |  | For the Year Ended December 31, 2017
Risk-free interest rate |  | 2.8% |  | 2.5% |  | 1.9%
Dividend yield |  | 0% |  | 0% |  | 0%
Expected volatility |  | 55% |  | 57% |  | 61%
Expected life |  | 6.5 years |  | 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://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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