Note 9 - Stock Options (Details) - Summary of the Status of Non-Vested Shares (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Summary of the Status of Non-Vested Shares [Abstract]
Non-vested at January 1, 2013	666,668	810,000
Non-vested at January 1, 2013	$ 0.54	$ 0.37
Non-vested, Number of Shares	498,504	666,668
Non-vested, Weighted-Average Grant-Date Fair Value	$ 1.05	$ 0.54
Granted, Shares	462,500	658,000
Granted, Weighted-Average Grant-Date Fair Value	$ 1.67	$ 0.84
Vested, Shares	(566,664)	(638,330)
Vested, Weighted-Average Grant-Date Fair Value	$ 0.87	$ 0.60
Forfeited, Shares	(64,000)	(163,002)
Forfeited, Weighted-Average Grant-Date Fair Value	$ 1.74	$ 0.67

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Gross number of share options (or share units) granted during the period.

+ References

No definition available.

+ Details

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ 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 (d)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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- Definition

Number of non-vested options outstanding.

+ References

No definition available.

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- Definition

Number of non-vested options forfeited.

+ References

No definition available.

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- Definition

Weighted average grant-date fair value of non-vested options forfeited.

+ References

No definition available.

+ Details

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- Definition

Weighted average grant-date fair value of non-vested options outstanding.

+ References

No definition available.

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- Definition

Number of options vested.

+ References

No definition available.

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- Definition

Weighted average grant-date fair value of options vested.

+ References

No definition available.

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