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Note 14 - Stockholders' Equity (Tables) | 3 Months Ended
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Mar. 31, 2016
Stockholders' Equity Note [Abstract] |
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block] | Following is a summary of the warrant activity for the three months ended March 31, 2016:
|  | Number of Warrants |  |  | Average Exercise Price |  |  | Weighted Average Remaining Contractual Term in Years |
Outstanding at January 1, 2016 |  |  | 2,050,001 |  |  |  | 2.74 |  |  |  | 4.82 |
Granted |  |  | - |  |  |  | - |  |  |  | - |
Exercised / surrendered |  |  | - |  |  |  | - |  |  |  | - |
Expired |  |  | - |  |  |  | - |  |  |  | - |
Outstanding at March 31, 2016 |  |  | 2,050,001 |  |  |  | 2.74 |  |  |  | 4.56 |
Exercisable at March 31, 2016 |  |  | 2,050,001 |  |  |  | 2.74 |  |  |  | 4.56 |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Table Text Block] | The Company estimated the fair value of its warrants as of March 31, 2015 using the Binomial option pricing model using the following assumptions:
|  | Series A Warrants |  |  | Series C Warrants |  |  | Placement Agent Warrants |  |  | Total |
At March 31, 2015: |  |  |  |  |  |  |  |  |  |  |  |
Market price of common stock ($) |  |  | 2.50 |  |  |  | 2.50 |  |  |  | 2.50 |  |  |  |
Number of shares of common stock underlying the warrants |  |  | 660,030 |  |  |  | 310,478 |  |  |  | 92,404 |  |  |  | 1,062,912 |
Exercise price ($) |  |  | 8.48 |  |  |  | 8.53 |  |  |  | 8.48 |  |  |  |  |
Remaining contractual life (years): |  |  | 3.04 |  |  |  | 3.04 |  |  |  | 3.04 |  |  |  |  |
Dividend yield: |  |  | – |  |  |  | – |  |  |  | – |  |  |  |  |
Expected volatility: |  |  | 72 | % |  |  | 72 | % |  |  | 72 | % |  |  |  |
Risk-free interest rate: |  |  | 0.89 | % |  |  | 0.89 | % |  |  | 0.89 | % |  |  |  |
Fair value ($) |  |  | 306,150 |  |  |  | 143,182 |  |  |  | 43,042 |  |  |  | 492,374 |

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- Definition Tabular disclosure of the inputs and valuation techniques used to measure fair value, and a discussion of changes in valuation techniques and related inputs, if any, applied during the period to each separate class of assets, liabilities, and financial instruments classified in shareholders' equity that are measured on a recurring and/or nonrecurring basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6784392&loc=d3e188667-122775 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=51659978&loc=d3e25284-112666 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 28 -Article 5 + Details
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