Note 12 - Financial Instruments (Details Textual) - shares	6 Months Ended
Jun. 30, 2016	Dec. 31, 2015
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	4,693,700	4,743,700
Fair Value Assumptions Expected Volatility Rate Calculation Basis	5 years
Fair Value Assumptions, Expected Volatility Rate	92.67%
Increase (Decrease) in Volatility Rate Applied	5.00%
Fair Value Assumptions Resulting Increase (Decrease) in Fair Value	5.00%

Basis for calculating volatility rate, measured using a trailing average of the Company's share price.

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- Definition

Increase (decrease) in the fair value of financial instruments based on a change in assumptions used in the valuation model.

+ References

No definition available.

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- Definition

Increase or (decrease) in the volatility rate used in the valuation model to calculate the fair value of a financial instrument.

+ References

No definition available.

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- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ 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)(2))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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- Definition

Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price.

+ 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=66048111&loc=d3e19207-110258

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