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Stock-Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Share-based Compensation Arrangement by Share-based Payment Award Options and Warrants Vested and Expected to Vest Outstanding and Exercisable [Table Text Block] |
Exercise price |  | $ | 0.69 |
Expected dividends |  |  | 0 | %
Expected volatility |  |  | 86 | %
Risk free interest rate |  |  | 2.75 | %
Expected life of option |  |  | 4 years |
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] | A summary of stock option activity for the three months ended March 31, 2019 and the year ended December 31, 2018 is as follows:
|  | Options |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Life (in Years) |  |  | Aggregate Intrinsic Value |
Balance - December 31, 2017 |  |  | 359,076 |  |  | $ | 53.93 |  |  |  | 4.60 |  |  | $ | 1,800 |
Granted |  |  | 671,500 |  |  | $ | 0.69 |  |  |  |  |  |  |  |  |
Exercised |  |  | - |  |  | $ | - |  |  |  |  |  |  | $ | - |
Expired |  |  | (78,667 | ) |  | $ | 67.02 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (12,927 | ) |  | $ | 23.72 |  |  |  |  |  |  |  |  |
Balance - December 31, 2018 |  |  | 938,982 |  |  | $ | 15.18 |  |  |  | 6.19 |  |  | $ | - |
Granted |  |  | - |  |  | $ | - |  |  |  |  |  |  |  |  |
Exercised |  |  | - |  |  | $ | - |  |  |  |  |  |  | $ | - |
Expired |  |  | (16,954 | ) |  | $ | 91.53 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (28,661 | ) |  | $ | 11.40 |  |  |  |  |  |  |  |  |
Balance - March 31, 2019 - outstanding |  |  | 893,367 |  |  | $ | 13.85 |  |  |  | 5.90 |  |  | $ | - |
Balance - March 31, 2019 - exercisable |  |  | 265,619 |  |  | $ | 42.91 |  |  |  | 4.16 |  |  | $ | - |
Grant date fair value of options granted - March 31, 2019 |  |  |  |  |  | $ | - |  |  |  |  |  |  |  |  |
Weighted average grant date fair value - March 31, 2019 |  |  |  |  |  | $ | - |  |  |  |  |  |  |  |  |
Grant date fair value of options granted - December 31, 2018 |  |  |  |  |  | $ | 301,000 |  |  |  |  |  |  |  |  |
Weighted average grant date fair value - December 31, 2018 |  |  |  |  |  | $ | 0.45 |  |  |  |  |  |  |  |  |

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- Definition Tabular disclosure relates to share based compensation arrangement by share based payment award options and warrants vested and expected to vest outstanding and exercisable. + References No definition available. + Details
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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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