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Note 7 - Equity (Tables) | 6 Months Ended
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Jun. 30, 2015
Notes Tables |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | Six Months Ended June 30,
|  | 2015 |  | 2014
Expected volatility |  |  | 46% | - | 47% |  |  |  | 43% | - | 46% |
Expected dividends |  |  |  | None |  |  |  |  |  | None |  |
Expected term (years) |  |  | 5 | - | 6.25 |  |  |  | 5.5 | - | 7.5 |
Risk-free rate |  |  | 1.32% | to | 1.74% |  |  |  | 0.07% | - | 2.05% |
Forfeiture rate |  |  |  | 20% |  |  |  |  |  | None |  |
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] |
|  | Number of Shares |  | Weighted Average Exercise Price |  | Weighted Average Fair Value |  | Weighted Average Remaining Contractual Life
Outstanding at December 31, 2014 |  |  | 314,775 |  |  | $ | 2.04 |  |  | $ | 0.92 |  |  |  | 9.2 |
Granted at market price |  |  | 61,500 |  |  |  | 8.16 |  |  |  |  |  |  |  |  |
Exercised |  |  | - |  |  |  | - |  |  |  |  |  |  |  |  |
Cancelled |  |  | - |  |  |  | - |  |  |  |  |  |  |  |  |
Outstanding at June 30, 2015 |  |  | 376,275 |  |  | $ | 3.20 |  |  | $ | 1.46 |  |  |  | 8.9 |
Exercisable at June 30, 2015 |  |  | 90,377 |  |  | $ | 1.91 |  |  | $ | 0.86 |  |  |  | 8.7 |
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] |
Restricted Stock Awards |  | Shares
Outstanding at December 31, 2014 |  |  | 662,375 |
Restricted stock awards granted |  |  | - |
Awards forfeited or exercised |  |  | - |
Outstanding at June 30, 2015 |  |  | 662,375 |

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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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