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9. Outstanding Warrants (Tables) | 12 Months Ended
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Dec. 31, 2018
Stockholders' deficit: |
Weighted average assumptions |
Description |  | For the year ended December 31 |
|  | 2018 |  |  | 2017 |
Dividend-yield |  |  | 0 | % |  |  | 0 | %
Risk-free interest rate |  |  | 2.25 | % |  |  | 1.32 | %
Expected volatility |  |  | 92.2 | % |  |  | 68.5 | %
Expected life (years) |  |  | 2 |  |  |  | 2 |
Market value per share on grant date |  | $ | 1.05 |  |  | $ | 1.43 |
Exercise price per share |  | $ | 0.01 |  |  | $ | 0.01 |
Fair value per share on grant date |  | $ | 1.04 |  |  | $ | 1.42 |
Schedule of warrant activity |
|  | Warrants Outstanding & Exercisable |  |  | Weighted - Average Exercise Price |  |  | Average Remaining Term in Years |
Outstanding December 31, 2016 |  |  | 344 |  |  | $ | 3.33 |  |  |  | 3.88 |
Granted |  |  | 227 |  |  |  | 0.01 |  |  |  |  |
Exercised |  |  | (241 | ) |  |  | 0.01 |  |  |  |  |
Expired |  |  | - |  |  |  | - |  |  |  |  |
Outstanding December 31, 2017 |  |  | 330 |  |  | $ | 3.47 |  |  |  | 3.02 |
Granted |  |  | 227 |  |  |  | 0.01 |  |  |  |  |
Exercised |  |  | (227 | ) |  |  | 0.01 |  |  |  |  |
Expired |  |  | (235 | ) |  |  | 3.82 |  |  |  |  |
Outstanding December 31, 2018 |  |  | 95 |  |  | $ | 2.59 |  |  |  | 6.95 |

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- Definition Tabular disclosure of the assumptions used to determine for pension plans and/or other employee benefit plans the benefit obligation and net benefit cost, including assumed discount rates, rate increase in compensation increase, and expected long-term rates of return on plan assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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