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Note 14 - Stockholders' Equity (Details) - Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques - USD ($) | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
Mar. 31, 2015 | Mar. 24, 2016 | Apr. 14, 2014 | May. 03, 2013
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |
Market price of common stock ($) (in Dollars per share) |  | $ 1.20 |  | $ 3.82
Number of shares of common stock underlying the warrants (in Shares) | 1,062,912 |  |  |
Fair value ($) (in Dollars) | $ 492,374 |  |  |
Series A Warrants [Member] |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |
Market price of common stock ($) (in Dollars per share) | $ 2.50 |  |  |
Number of shares of common stock underlying the warrants (in Shares) | 660,030 |  |  |
Exercise price ($) (in Dollars per share) | $ 8.48 |  | $ 8.48 |
Remaining contractual life (years): | 3 years 14 days |  |  |
Dividend yield: | 0.00% |  |  |
Expected volatility: | 72.00% |  |  |
Risk-free interest rate: | 0.89% |  |  |
Fair value ($) (in Dollars) | $ 306,150 |  |  |
Series C Warrants [Member] |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |
Market price of common stock ($) (in Dollars per share) | $ 2.50 |  |  |
Number of shares of common stock underlying the warrants (in Shares) | 310,478 |  |  |
Exercise price ($) (in Dollars per share) | $ 8.53 |  | $ 8.53 |
Remaining contractual life (years): | 3 years 14 days |  |  |
Dividend yield: | 0.00% |  |  |
Expected volatility: | 72.00% |  |  |
Risk-free interest rate: | 0.89% |  |  |
Fair value ($) (in Dollars) | $ 143,182 |  |  |
Placement Agent Warrants [Member] |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |
Market price of common stock ($) (in Dollars per share) | $ 2.50 |  |  |
Number of shares of common stock underlying the warrants (in Shares) | 92,404 |  |  |
Exercise price ($) (in Dollars per share) | $ 8.48 |  |  |
Remaining contractual life (years): | 3 years 14 days |  |  |
Dividend yield: | 0.00% |  |  |
Expected volatility: | 72.00% |  |  |
Risk-free interest rate: | 0.89% |  |  |
Fair value ($) (in Dollars) | $ 43,042 |  |  |

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