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Stock Options (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] | The fair value of stock options is estimated on the date of grant using the Black-Scholes option pricing model. The weighted average fair values of the options granted and weighted average assumptions are as follows:
|  | For the Years Ended December 31, |
|  | 2018 |  |  | 2017 |
Weighted average fair value of options granted |  | $ | 0.54 |  |  | $ | 0.73 |
Risk-free interest rate |  |  | 2.73 | % |  |  | 1.91 | %
Expected life (years) |  |  | 5-6 |  |  |  | 6 |
Expected volatility factor |  |  | 44.16%-48.82 | % |  |  | 49.62 | %
Expected dividends |  |  | None |  |  |  | None |
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] | A summary of option activity under the Plans as of December 31, 2018, and changes during the year then ended, are presented below:
|  | Number of Options |  |  | Weighted - Average Exercise Price |  |  | Weighted-Average Remaining Contractual Term (years) |  |  | Aggregate Intrinsic Value |
Outstanding at January 1, 2018 |  |  | 4,241,799 |  |  | $ | 2.82 |  |  |  |  |  |  |  |  |
Granted |  |  | 1,997,500 |  |  |  | 1.09 |  |  |  |  |  |  |  |  |
Exercised |  |  | - |  |  |  | - |  |  |  |  |  |  |  |  |
Forfeited/Expired |  |  | (1,257,259 | ) |  |  | 2.76 |  |  |  |  |  |  |  |  |
Outstanding at December 31, 2018 |  |  | 4,982,040 |  |  | $ | 2.14 |  |  |  | 6.62 |  |  | $ | 811,025 |
Exercisable at December 31, 2018 |  |  | 3,272,477 |  |  | $ | 2.62 |  |  |  | 5.19 |  |  | $ | 200,524 |
Vested and Expected to Vest at December 31, 2018 |  |  | 4,982,040 |  |  | $ | 2.14 |  |  |  | 6.62 |  |  | $ | 811,025 |

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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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